[🐛 Bug]: Sessions Id not being released

[pok2ca]

Sessions Id not being released

How do you trigger this bug ?
When running any test on any programming language.

What did you expect to happen ?
Expect the sessions are released at end of test when driver.quit() is called or when I call
curl --request DELETE http://localhost:4444/session/<SESSION_ID>

Tests run normally but the sessions are not released at end of tests. The session slot become full and no other test is able to start. Then I restart selenium-distributor container in order to clean the sessions.
I am able to list the sessions ID through curl --request GET 'http://localhost:4444/status'

but deletion return message:
curl --request DELETE http://localhost:4444/wd/hub/session/e1d792ba-5f1c-4403-aa9b-3145a69919fe --header 'X-REGISTRATION-SECRET'
{
"value": {
"message": "Cannot find session with id: e1d792ba-5f1c-4403-aa9b-3145a69919fe",
"stacktrace": "",
"error": "invalid session id"
}

NOTE: The same configuration running at version 4.38.0-20251101 works fine

Command used to start Selenium Grid with Docker (or Kubernetes)

services:
  selenium-event-bus:
    image: selenium/event-bus:4.41.0-20260222
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'selenium-event-bus'
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=selenium-event-bus'
  selenium-sessions:
    image: selenium/sessions:4.41.0-20260222
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'selenium-sessions'
    depends_on:
      - selenium-event-bus
    environment:
      - SE_EVENT_BUS_HOST=localhost
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=selenium_sessions'
  selenium-session-queue:
    image: selenium/session-queue:4.41.0-20260222
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'selenium-session-queue'
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=selenium_session_queue'
  selenium-distributor:
    image: selenium/distributor:4.41.0-20260222
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'selenium-distributor'
    depends_on:
      - selenium-event-bus
      - selenium-sessions
      - selenium-session-queue
    environment:
      - SE_EVENT_BUS_HOST=localhost
      - SE_SESSIONS_MAP_HOST=localhost
      - SE_SESSION_QUEUE_HOST=localhost
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=selenium_distributor'
  selenium-router:
    image: selenium/router:4.41.0-20260222
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'selenium-router'
    depends_on:
      - selenium-distributor
      - selenium-sessions
      - selenium-session-queue
    environment:
      - SE_DISTRIBUTOR_HOST=localhost
      - SE_SESSIONS_MAP_HOST=localhost
      - SE_SESSION_QUEUE_HOST=localhost
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=selenium_router'
  chrome:
    image: selenium/node-chrome:136.0-20251101
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'chrome'
    platform: linux/amd64
    shm_size: 2gb
    depends_on:
      - selenium-event-bus
    volumes:
      - /etc/ssl:/etc/ssl:ro
    environment:
      - SE_EVENT_BUS_HOST=localhost
      - SE_NO_VNC_PORT=7900
      - SE_NODE_PORT=5560
      - SE_VNC_NO_PASSWORD=true
      - SE_VNC_VIEW_ONLY=true
      - SE_NODE_MAX_SESSIONS=5
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=chrome'
  edge:
    image: selenium/node-edge:142.0-20251101
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'edge'
    platform: linux/amd64
    shm_size: 2gb
    depends_on:
      - selenium-event-bus
    volumes:
      - /etc/ssl:/etc/ssl:ro
    environment:
      - SE_EVENT_BUS_HOST=localhost
      - SE_NO_VNC_PORT=7901
      - SE_NODE_PORT=5562
      - SE_VNC_NO_PASSWORD=true
      - SE_VNC_VIEW_ONLY=true
      - SE_NODE_MAX_SESSIONS=5
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=edge'
  firefox:
    image: selenium/node-firefox:144.0.2-20251101
    network_mode: 'host'
    restart: unless-stopped
    container_name: 'firefox'
    shm_size: 2gb
    depends_on:
      - selenium-event-bus
    volumes:
      - /etc/ssl:/etc/ssl:ro
    environment:
      - SE_EVENT_BUS_HOST=localhost
      - SE_NO_VNC_PORT=7902
      - SE_NODE_PORT=5564
      - SE_VNC_NO_PASSWORD=true
      - SE_VNC_VIEW_ONLY=true
      - SE_NODE_MAX_SESSIONS=5
    logging:
      driver: 'journald'
      options:
        tag: 'docker_container: containerName=firefox'

Relevant log output

# docker compose logs selenium-distributor
selenium-distributor  | Virtual environment detected at /home/seluser/venv, activating...
selenium-distributor  | Python 3.14.3
selenium-distributor  | 2026-03-30 16:45:21,960 INFO Included extra file "/etc/supervisor/conf.d/selenium-grid-distributor.conf" during parsing
selenium-distributor  | 2026-03-30 16:45:22,173 INFO RPC interface 'supervisor' initialized
selenium-distributor  | 2026-03-30 16:45:22,177 INFO supervisord started with pid 9
selenium-distributor  | 2026-03-30 16:45:22,184 INFO spawned: 'selenium-grid-distributor' with pid 10
selenium-distributor  | Starting Selenium Grid Distributor...
selenium-distributor  | 2026-03-30 16:45:22,204 INFO success: selenium-grid-distributor entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
selenium-distributor  | Appending Selenium option: --publish-events tcp://localhost:4442
selenium-distributor  | Appending Selenium option: --subscribe-events tcp://localhost:4443
selenium-distributor  | Appending Selenium option: --sessions-host localhost
selenium-distributor  | Appending Selenium option: --sessions-port 5556
selenium-distributor  | Appending Selenium option: --sessionqueue-host localhost
selenium-distributor  | Appending Selenium option: --sessionqueue-port 5559
selenium-distributor  | Appending Selenium option: --port 5553
selenium-distributor  | Appending Selenium option: --bind-host false
selenium-distributor  | Appending Selenium option: --healthcheck-interval 120
selenium-distributor  | Appending Selenium option: --session-retry-interval 15
selenium-distributor  | Appending Selenium option: --session-request-timeout 300
selenium-distributor  | Appending Selenium option: --log-level INFO
selenium-distributor  | Appending Selenium option: --http-logs false
selenium-distributor  | Appending Selenium option: --structured-logs false
selenium-distributor  | Appending Selenium option: --plain-logs true
selenium-distributor  | Appending Selenium option: --reject-unsupported-caps false
selenium-distributor  | Appending Selenium option: --tracing false
selenium-distributor  | Tracing is disabled
selenium-distributor  | Using JAVA_OPTS:  -Dwebdriver.remote.enableTracing=false -Dwebdriver.httpclient.version=HTTP_1_1
selenium-distributor  | 16:45:26.576 INFO [LoggingOptions.configureLogEncoding] - Using the system default encoding
selenium-distributor  | 16:45:26.708 INFO [LoggingOptions.getTracer] - Using null tracer
selenium-distributor  | 16:45:27.560 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://localhost:4442 and tcp://localhost:4443
selenium-distributor  | 16:45:27.956 INFO [ZmqUtils.configureHeartbeat] - ZMQ SUB socket heartbeat configured: interval=60s, timeout=180s, ttl=360s
selenium-distributor  | 16:45:28.156 INFO [ZmqUtils.configureHeartbeat] - ZMQ PUB socket heartbeat configured: interval=60s, timeout=180s, ttl=360s
selenium-distributor  | 16:45:28.229 INFO [UnboundZmqEventBus.<init>] - Sockets created
selenium-distributor  | 16:45:29.257 INFO [UnboundZmqEventBus.<init>] - Event bus ready
selenium-distributor  | 16:45:29.287 INFO [LoggingOptions.getTracer] - Using null tracer
selenium-distributor  | 16:45:33.500 INFO [LoggingOptions.getTracer] - Using null tracer
selenium-distributor  | 16:45:34.375 WARN [HostIdentifier.resolveHostAddress] - Failed to resolve host address
selenium-distributor  | java.net.UnknownHostException: hidden-host-q-int.hidden-domain: hidden-host-q-int.hidden-domain: Name or service not known
selenium-distributor  |         at java.base/java.net.InetAddress.getLocalHost(InetAddress.java:1936)
selenium-distributor  |         at org.openqa.selenium.net.HostIdentifier.resolveHostAddress(HostIdentifier.java:105)
selenium-distributor  |         at org.openqa.selenium.net.HostIdentifier.getHostAddress(HostIdentifier.java:124)
selenium-distributor  |         at org.openqa.selenium.net.DefaultNetworkInterfaceProvider.<init>(DefaultNetworkInterfaceProvider.java:55)
selenium-distributor  |         at org.openqa.selenium.net.NetworkUtils.<init>(NetworkUtils.java:50)
selenium-distributor  |         at org.openqa.selenium.grid.server.BaseServerOptions.lambda$getExternalUri$1(BaseServerOptions.java:106)
selenium-distributor  |         at java.base/java.util.Optional.orElseGet(Optional.java:364)
selenium-distributor  |         at org.openqa.selenium.grid.server.BaseServerOptions.lambda$getExternalUri$2(BaseServerOptions.java:103)
selenium-distributor  |         at java.base/java.util.Optional.orElseGet(Optional.java:364)
selenium-distributor  |         at org.openqa.selenium.grid.server.BaseServerOptions.getExternalUri(BaseServerOptions.java:98)
selenium-distributor  |         at org.openqa.selenium.netty.server.NettyServer.<init>(NettyServer.java:112)
selenium-distributor  |         at org.openqa.selenium.grid.TemplateGridServerCommand$1.<init>(TemplateGridServerCommand.java:50)
selenium-distributor  |         at org.openqa.selenium.grid.TemplateGridServerCommand.asServer(TemplateGridServerCommand.java:49)
selenium-distributor  |         at org.openqa.selenium.grid.distributor.httpd.DistributorServer.execute(DistributorServer.java:152)
selenium-distributor  |         at org.openqa.selenium.grid.TemplateGridCommand.lambda$configure$4(TemplateGridCommand.java:123)
selenium-distributor  |         at org.openqa.selenium.grid.Main.launch(Main.java:83)
selenium-distributor  |         at org.openqa.selenium.grid.Main.go(Main.java:56)
selenium-distributor  |         at org.openqa.selenium.grid.Main.main(Main.java:41)
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-distributor  |         at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-distributor  |         at org.openqa.selenium.grid.Bootstrap.runMain(Bootstrap.java:77)
selenium-distributor  |         at org.openqa.selenium.grid.Bootstrap.main(Bootstrap.java:70)
selenium-distributor  | Caused by: java.net.UnknownHostException: hidden-host-q-int.hidden-domain: Name or service not known
selenium-distributor  |         at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
selenium-distributor  |         at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:52)
selenium-distributor  |         at java.base/java.net.InetAddress$PlatformResolver.lookupByName(InetAddress.java:1211)
selenium-distributor  |         at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1828)
selenium-distributor  |         at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:1139)
selenium-distributor  |         at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)
selenium-distributor  |         at java.base/java.net.InetAddress.getLocalHost(InetAddress.java:1931)
selenium-distributor  |         ... 21 more
selenium-distributor  | 16:45:35.082 INFO [DistributorServer.execute] - Started Selenium Distributor 4.41.0 (revision 9fc754f90a): http://172.17.0.1:5553
selenium-distributor  | 16:45:47.914 INFO [Node.<init>] - Binding additional locator mechanisms: relative
selenium-distributor  | 16:45:49.644 INFO [LocalGridModel.setAvailability] - Switching Node 0954a67f-3bd0-4bc2-b15a-c494eff6fbc6 (uri: http://172.17.0.1:5562) from DOWN to UP
selenium-distributor  | 16:45:49.650 INFO [LocalNodeRegistry.add] - Added node 0954a67f-3bd0-4bc2-b15a-c494eff6fbc6 at http://172.17.0.1:5562. Health check every 120s
selenium-distributor  | 16:45:49.662 INFO [Node.<init>] - Binding additional locator mechanisms: relative
selenium-distributor  | 16:45:50.464 INFO [LocalGridModel.setAvailability] - Switching Node 8dafee8a-ed7b-4a4b-a8d3-30f19491ba38 (uri: http://172.17.0.1:5564) from DOWN to UP
selenium-distributor  | 16:45:50.464 INFO [LocalNodeRegistry.add] - Added node 8dafee8a-ed7b-4a4b-a8d3-30f19491ba38 at http://172.17.0.1:5564. Health check every 120s
selenium-distributor  | 16:45:50.477 INFO [Node.<init>] - Binding additional locator mechanisms: relative
selenium-distributor  | 16:45:50.950 INFO [LocalGridModel.setAvailability] - Switching Node 0cd3f2c7-5d68-415d-aa1f-1cf6f5c4a950 (uri: http://172.17.0.1:5560) from DOWN to UP
selenium-distributor  | 16:45:50.952 INFO [LocalNodeRegistry.add] - Added node 0cd3f2c7-5d68-415d-aa1f-1cf6f5c4a950 at http://172.17.0.1:5560. Health check every 120s
selenium-distributor  | Trapped SIGTERM/SIGINT/x so shutting down supervisord...
selenium-distributor  | 2026-03-30 16:47:20,046 WARN received SIGTERM indicating exit request
selenium-distributor  | 2026-03-30 16:47:20,049 INFO waiting for selenium-grid-distributor to die
selenium-distributor  | 16:47:20.889 INFO [LocalGridModel.setAvailability] - Switching Node 8dafee8a-ed7b-4a4b-a8d3-30f19491ba38 (uri: http://172.17.0.1:5564) from UP to DRAINING
selenium-distributor  | 2026-03-30 16:47:20,948 WARN stopped: selenium-grid-distributor (terminated by SIGTERM)
selenium-distributor  | Shutdown complete
selenium-distributor  | Virtual environment detected at /home/seluser/venv, activating...
selenium-distributor  | Python 3.14.3
selenium-distributor  | 2026-03-30 16:48:02,963 INFO Included extra file "/etc/supervisor/conf.d/selenium-grid-distributor.conf" during parsing
selenium-distributor  | 2026-03-30 16:48:03,023 INFO RPC interface 'supervisor' initialized
selenium-distributor  | 2026-03-30 16:48:03,023 INFO supervisord started with pid 11
selenium-distributor  | 2026-03-30 16:48:03,078 INFO spawned: 'selenium-grid-distributor' with pid 12
selenium-distributor  | Starting Selenium Grid Distributor...
selenium-distributor  | 2026-03-30 16:48:03,126 INFO success: selenium-grid-distributor entered RUNNING state, process has stayed up for > than 0 seconds (startsecs)
selenium-distributor  | Appending Selenium option: --publish-events tcp://localhost:4442
selenium-distributor  | Appending Selenium option: --subscribe-events tcp://localhost:4443
selenium-distributor  | Appending Selenium option: --sessions-host localhost
selenium-distributor  | Appending Selenium option: --sessions-port 5556
selenium-distributor  | Appending Selenium option: --sessionqueue-host localhost
selenium-distributor  | Appending Selenium option: --sessionqueue-port 5559
selenium-distributor  | Appending Selenium option: --port 5553
selenium-distributor  | Appending Selenium option: --bind-host false
selenium-distributor  | Appending Selenium option: --healthcheck-interval 120
selenium-distributor  | Appending Selenium option: --session-retry-interval 15
selenium-distributor  | Appending Selenium option: --session-request-timeout 300
selenium-distributor  | Appending Selenium option: --log-level INFO
selenium-distributor  | Appending Selenium option: --http-logs false
selenium-distributor  | Appending Selenium option: --structured-logs false
selenium-distributor  | Appending Selenium option: --plain-logs true
selenium-distributor  | Appending Selenium option: --reject-unsupported-caps false
selenium-distributor  | Appending Selenium option: --tracing false
selenium-distributor  | Tracing is disabled
selenium-distributor  | Using JAVA_OPTS:  -Dwebdriver.remote.enableTracing=false -Dwebdriver.httpclient.version=HTTP_1_1
selenium-distributor  | 16:48:13.896 INFO [LoggingOptions.configureLogEncoding] - Using the system default encoding
selenium-distributor  | 16:48:14.326 INFO [LoggingOptions.getTracer] - Using null tracer
selenium-distributor  | 16:48:16.227 INFO [UnboundZmqEventBus.<init>] - Connecting to tcp://localhost:4442 and tcp://localhost:4443
selenium-distributor  | 16:48:17.298 INFO [ZmqUtils.configureHeartbeat] - ZMQ SUB socket heartbeat configured: interval=60s, timeout=180s, ttl=360s
selenium-distributor  | 16:48:17.795 INFO [ZmqUtils.configureHeartbeat] - ZMQ PUB socket heartbeat configured: interval=60s, timeout=180s, ttl=360s
selenium-distributor  | 16:48:17.857 INFO [UnboundZmqEventBus.<init>] - Sockets created
selenium-distributor  | 16:48:18.952 INFO [UnboundZmqEventBus.<init>] - Event bus ready
selenium-distributor  | 16:48:19.019 INFO [LoggingOptions.getTracer] - Using null tracer
selenium-distributor  | 16:48:30.580 INFO [LoggingOptions.getTracer] - Using null tracer
selenium-distributor  | 16:48:33.142 WARN [HostIdentifier.resolveHostAddress] - Failed to resolve host address
selenium-distributor  | java.net.UnknownHostException: hidden-host-q-int.hidden-domain: hidden-host-q-int.hidden-domain: Name or service not known
selenium-distributor  |         at java.base/java.net.InetAddress.getLocalHost(InetAddress.java:1936)
selenium-distributor  |         at org.openqa.selenium.net.HostIdentifier.resolveHostAddress(HostIdentifier.java:105)
selenium-distributor  |         at org.openqa.selenium.net.HostIdentifier.getHostAddress(HostIdentifier.java:124)
selenium-distributor  |         at org.openqa.selenium.net.DefaultNetworkInterfaceProvider.<init>(DefaultNetworkInterfaceProvider.java:55)
selenium-distributor  |         at org.openqa.selenium.net.NetworkUtils.<init>(NetworkUtils.java:50)
selenium-distributor  |         at org.openqa.selenium.grid.server.BaseServerOptions.lambda$getExternalUri$1(BaseServerOptions.java:106)
selenium-distributor  |         at java.base/java.util.Optional.orElseGet(Optional.java:364)
selenium-distributor  |         at org.openqa.selenium.grid.server.BaseServerOptions.lambda$getExternalUri$2(BaseServerOptions.java:103)
selenium-distributor  |         at java.base/java.util.Optional.orElseGet(Optional.java:364)
selenium-distributor  |         at org.openqa.selenium.grid.server.BaseServerOptions.getExternalUri(BaseServerOptions.java:98)
selenium-distributor  |         at org.openqa.selenium.netty.server.NettyServer.<init>(NettyServer.java:112)
selenium-distributor  |         at org.openqa.selenium.grid.TemplateGridServerCommand$1.<init>(TemplateGridServerCommand.java:50)
selenium-distributor  |         at org.openqa.selenium.grid.TemplateGridServerCommand.asServer(TemplateGridServerCommand.java:49)
selenium-distributor  |         at org.openqa.selenium.grid.distributor.httpd.DistributorServer.execute(DistributorServer.java:152)
selenium-distributor  |         at org.openqa.selenium.grid.TemplateGridCommand.lambda$configure$4(TemplateGridCommand.java:123)
selenium-distributor  |         at org.openqa.selenium.grid.Main.launch(Main.java:83)
selenium-distributor  |         at org.openqa.selenium.grid.Main.go(Main.java:56)
selenium-distributor  |         at org.openqa.selenium.grid.Main.main(Main.java:41)
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-distributor  |         at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-distributor  |         at org.openqa.selenium.grid.Bootstrap.runMain(Bootstrap.java:77)
selenium-distributor  |         at org.openqa.selenium.grid.Bootstrap.main(Bootstrap.java:70)
selenium-distributor  | Caused by: java.net.UnknownHostException: hidden-host-q-int.hidden-domain: Name or service not known
selenium-distributor  |         at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Native Method)
selenium-distributor  |         at java.base/java.net.Inet6AddressImpl.lookupAllHostAddr(Inet6AddressImpl.java:52)
selenium-distributor  |         at java.base/java.net.InetAddress$PlatformResolver.lookupByName(InetAddress.java:1211)
selenium-distributor  |         at java.base/java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1828)
selenium-distributor  |         at java.base/java.net.InetAddress$NameServiceAddresses.get(InetAddress.java:1139)
selenium-distributor  |         at java.base/java.net.InetAddress.getAllByName0(InetAddress.java:1818)
selenium-distributor  |         at java.base/java.net.InetAddress.getLocalHost(InetAddress.java:1931)
selenium-distributor  |         ... 21 more
selenium-distributor  | 16:48:34.948 INFO [DistributorServer.execute] - Started Selenium Distributor 4.41.0 (revision 9fc754f90a): http://172.17.0.1:5553
selenium-distributor  | 16:48:42.618 INFO [Node.<init>] - Binding additional locator mechanisms: relative
selenium-distributor  | 16:48:44.456 INFO [LocalGridModel.setAvailability] - Switching Node 2a960ee3-7e40-4324-a639-fc594f6cca51 (uri: http://172.17.0.1:5564) from DOWN to UP
selenium-distributor  | 16:48:44.459 INFO [LocalNodeRegistry.add] - Added node 2a960ee3-7e40-4324-a639-fc594f6cca51 at http://172.17.0.1:5564. Health check every 120s
selenium-distributor  | 16:48:44.505 INFO [Node.<init>] - Binding additional locator mechanisms: relative
selenium-distributor  | 16:48:45.967 INFO [LocalGridModel.setAvailability] - Switching Node 375e15b8-f501-40f1-85bf-e8da2c64b8de (uri: http://172.17.0.1:5562) from DOWN to UP
selenium-distributor  | 16:48:45.967 INFO [LocalNodeRegistry.add] - Added node 375e15b8-f501-40f1-85bf-e8da2c64b8de at http://172.17.0.1:5562. Health check every 120s
selenium-distributor  | 16:48:45.974 INFO [Node.<init>] - Binding additional locator mechanisms: relative
selenium-distributor  | 16:48:46.810 INFO [LocalGridModel.setAvailability] - Switching Node 0e5e0eff-7ca2-472e-a230-df5d7ffc401a (uri: http://172.17.0.1:5560) from DOWN to UP
selenium-distributor  | 16:48:46.811 INFO [LocalNodeRegistry.add] - Added node 0e5e0eff-7ca2-472e-a230-df5d7ffc401a at http://172.17.0.1:5560. Health check every 120s
selenium-distributor  | 16:52:48.235 INFO [LocalDistributor.newSession] - Session request received by the Distributor:
selenium-distributor  |  [Capabilities {browserName: chrome, goog:chromeOptions: {args: [--no-sandbox, --disable-dev-shm-usage, --disable-gpu], extensions: []}, pageLoadStrategy: normal, se:name: Selenium Grid Remote Test, se:recordVideo: true, se:timeouts: {session: 300}}]
selenium-distributor  | 16:52:55.050 INFO [LocalDistributor.newSession] - Session created by the Distributor. Id: b9117dc4f61045cd0c72da03976f6ee7
selenium-distributor  |  Caps: Capabilities {acceptInsecureCerts: false, browserName: chrome, browserVersion: 136.0.7103.113, chrome: {chromedriverVersion: 136.0.7103.113 (76fa3c17824..., userDataDir: /tmp/.org.chromium.Chromium...}, fedcm:accounts: true, goog:chromeOptions: {debuggerAddress: localhost:41301}, networkConnectionEnabled: false, pageLoadStrategy: normal, platformName: linux, proxy: {}, se:bidiEnabled: false, se:cdp: ws://172.17.0.1:4444/sessio..., se:cdpVersion: 136.0.7103.113, se:containerName: hidden-host-q-int.i..., se:deleteSessionOnUi: true, se:downloadsEnabled: true, se:name: Selenium Grid Remote Test, se:noVncPort: 7900, se:recordVideo: true, se:timeouts: {session: 300}, se:vnc: ws://172.17.0.1:4444/sessio..., se:vncEnabled: true, se:vncLocalAddress: ws://172.17.0.1:7900, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify, webauthn:extension:credBlob: true, webauthn:extension:largeBlob: true, webauthn:extension:minPinLength: true, webauthn:extension:prf: true, webauthn:virtualAuthenticators: true}
selenium-distributor  | 16:53:32.434 WARN [UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2] - Caught exception from listener: org.openqa.selenium.events.EventListener@4baa3061
selenium-distributor  | org.openqa.selenium.json.JsonException: Unable to parse: "b9117dc4f61045cd0c72da03976f6ee7"
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:170)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:153)
selenium-distributor  |         at org.openqa.selenium.events.Event.getData(Event.java:58)
selenium-distributor  |         at org.openqa.selenium.events.EventListener.accept(EventListener.java:42)
selenium-distributor  |         at org.openqa.selenium.events.EventListener.accept(EventListener.java:24)
selenium-distributor  |         at org.openqa.selenium.events.zeromq.UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2(UnboundZmqEventBus.java:332)
selenium-distributor  |         at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
selenium-distributor  |         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
selenium-distributor  |         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
selenium-distributor  |         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
selenium-distributor  |         at java.base/java.lang.Thread.run(Thread.java:1583)
selenium-distributor  | Caused by: org.openqa.selenium.json.JsonException: Unable to create instance of class org.openqa.selenium.grid.data.SessionClosedData
selenium-distributor  | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor  | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.42.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor  | Driver info: driver.version: unknown
selenium-distributor  |         at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:61)
selenium-distributor  |         at org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:143)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:205)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:168)
selenium-distributor  |         ... 10 more
selenium-distributor  | Caused by: java.lang.reflect.InvocationTargetException
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
selenium-distributor  |         at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-distributor  |         at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:59)
selenium-distributor  |         ... 13 more
selenium-distributor  | Caused by: org.openqa.selenium.json.JsonException: Expected to read a START_MAP but instead have: STRING. Last 0 characters read: , next 34 characters to read: "b9117dc4f61045cd0c72da03976f6ee7"
selenium-distributor  | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor  | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.42.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor  | Driver info: driver.version: unknown
selenium-distributor  |         at org.openqa.selenium.json.JsonInput.expect(JsonInput.java:515)
selenium-distributor  |         at org.openqa.selenium.json.JsonInput.beginObject(JsonInput.java:363)
selenium-distributor  |         at org.openqa.selenium.grid.data.SessionClosedData.fromJson(SessionClosedData.java:144)
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-distributor  |         ... 15 more
selenium-distributor  | 16:59:39.815 INFO [LocalDistributor.newSession] - Session request received by the Distributor:
selenium-distributor  |  [Capabilities {acceptInsecureCerts: true, browserName: firefox, moz:firefoxOptions: {prefs: {remote.active-protocols: 3}}, selenoid:options: {enableVNC: true, enableVideo: true}}]
selenium-distributor  | 16:59:48.455 INFO [LocalDistributor.newSession] - Session created by the Distributor. Id: d49c9cb1-1455-4c7f-8f4f-80d66c27c872
selenium-distributor  |  Caps: Capabilities {acceptInsecureCerts: true, browserName: firefox, browserVersion: 144.0.2, container:hostname: hidden-host-q-int.i..., moz:accessibilityChecks: false, moz:buildID: 20251027123126, moz:firefoxOptions: {prefs: {remote.active-protocols: 3}}, moz:geckodriverVersion: 0.36.0, moz:headless: false, moz:platformVersion: 5.14.0-611.42.1.el9_7.x86_64, moz:processID: 3652, moz:profile: /tmp/rust_mozprofileDedFbu, moz:shutdownTimeout: 60000, moz:webdriverClick: true, moz:windowless: false, pageLoadStrategy: normal, platformName: linux, proxy: {}, se:bidiEnabled: false, se:cdpEnabled: false, se:containerName: hidden-host-q-int.i..., se:deleteSessionOnUi: true, se:downloadsEnabled: true, se:noVncPort: 7900, se:vnc: ws://172.17.0.1:4444/sessio..., se:vncEnabled: true, se:vncLocalAddress: ws://172.17.0.1:7900, selenoid:options: {enableVNC: true, enableVideo: true}, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify, userAgent: Mozilla/5.0 (X11; Linux x86...}
selenium-distributor  | 17:00:34.801 WARN [UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2] - Caught exception from listener: org.openqa.selenium.events.EventListener@4baa3061
selenium-distributor  | org.openqa.selenium.json.JsonException: Unable to parse: "d49c9cb1-1455-4c7f-8f4f-80d66c27c872"
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:170)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:153)
selenium-distributor  |         at org.openqa.selenium.events.Event.getData(Event.java:58)
selenium-distributor  |         at org.openqa.selenium.events.EventListener.accept(EventListener.java:42)
selenium-distributor  |         at org.openqa.selenium.events.EventListener.accept(EventListener.java:24)
selenium-distributor  |         at org.openqa.selenium.events.zeromq.UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2(UnboundZmqEventBus.java:332)
selenium-distributor  |         at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
selenium-distributor  |         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
selenium-distributor  |         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
selenium-distributor  |         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
selenium-distributor  |         at java.base/java.lang.Thread.run(Thread.java:1583)
selenium-distributor  | Caused by: org.openqa.selenium.json.JsonException: Unable to create instance of class org.openqa.selenium.grid.data.SessionClosedData
selenium-distributor  | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor  | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.42.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor  | Driver info: driver.version: unknown
selenium-distributor  |         at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:61)
selenium-distributor  |         at org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:143)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:205)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:168)
selenium-distributor  |         ... 10 more
selenium-distributor  | Caused by: java.lang.reflect.InvocationTargetException
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
selenium-distributor  |         at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-distributor  |         at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:59)
selenium-distributor  |         ... 13 more
selenium-distributor  | Caused by: org.openqa.selenium.json.JsonException: Expected to read a START_MAP but instead have: STRING. Last 0 characters read: , next 38 characters to read: "d49c9cb1-1455-4c7f-8f4f-80d66c27c872"
selenium-distributor  | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor  | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.42.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor  | Driver info: driver.version: unknown
selenium-distributor  |         at org.openqa.selenium.json.JsonInput.expect(JsonInput.java:515)
selenium-distributor  |         at org.openqa.selenium.json.JsonInput.beginObject(JsonInput.java:363)
selenium-distributor  |         at org.openqa.selenium.grid.data.SessionClosedData.fromJson(SessionClosedData.java:144)
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-distributor  |         ... 15 more
selenium-distributor  | 17:00:34.917 INFO [LocalDistributor.newSession] - Session request received by the Distributor:
selenium-distributor  |  [Capabilities {acceptInsecureCerts: true, browserName: firefox, moz:firefoxOptions: {prefs: {remote.active-protocols: 3}}, selenoid:options: {enableVNC: true, enableVideo: true}}]
selenium-distributor  | 17:00:39.790 INFO [LocalDistributor.newSession] - Session created by the Distributor. Id: 0e0dcddf-a73b-40e8-a163-dd03c25c6e17
selenium-distributor  |  Caps: Capabilities {acceptInsecureCerts: true, browserName: firefox, browserVersion: 144.0.2, container:hostname: hidden-host-q-int.i..., moz:accessibilityChecks: false, moz:buildID: 20251027123126, moz:firefoxOptions: {prefs: {remote.active-protocols: 3}}, moz:geckodriverVersion: 0.36.0, moz:headless: false, moz:platformVersion: 5.14.0-611.42.1.el9_7.x86_64, moz:processID: 4197, moz:profile: /tmp/rust_mozprofileXT104B, moz:shutdownTimeout: 60000, moz:webdriverClick: true, moz:windowless: false, pageLoadStrategy: normal, platformName: linux, proxy: {}, se:bidiEnabled: false, se:cdpEnabled: false, se:containerName: hidden-host-q-int.i..., se:deleteSessionOnUi: true, se:downloadsEnabled: true, se:noVncPort: 7900, se:vnc: ws://172.17.0.1:4444/sessio..., se:vncEnabled: true, se:vncLocalAddress: ws://172.17.0.1:7900, selenoid:options: {enableVNC: true, enableVideo: true}, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify, userAgent: Mozilla/5.0 (X11; Linux x86...}
selenium-distributor  | 17:01:41.267 WARN [UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2] - Caught exception from listener: org.openqa.selenium.events.EventListener@4baa3061
selenium-distributor  | org.openqa.selenium.json.JsonException: Unable to parse: "0e0dcddf-a73b-40e8-a163-dd03c25c6e17"
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:170)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:153)
selenium-distributor  |         at org.openqa.selenium.events.Event.getData(Event.java:58)
selenium-distributor  |         at org.openqa.selenium.events.EventListener.accept(EventListener.java:42)
selenium-distributor  |         at org.openqa.selenium.events.EventListener.accept(EventListener.java:24)
selenium-distributor  |         at org.openqa.selenium.events.zeromq.UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2(UnboundZmqEventBus.java:332)
selenium-distributor  |         at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
selenium-distributor  |         at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
selenium-distributor  |         at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
selenium-distributor  |         at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
selenium-distributor  |         at java.base/java.lang.Thread.run(Thread.java:1583)
selenium-distributor  | Caused by: org.openqa.selenium.json.JsonException: Unable to create instance of class org.openqa.selenium.grid.data.SessionClosedData
selenium-distributor  | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor  | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.42.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor  | Driver info: driver.version: unknown
selenium-distributor  |         at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:61)
selenium-distributor  |         at org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:143)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:205)
selenium-distributor  |         at org.openqa.selenium.json.Json.toType(Json.java:168)
selenium-distributor  |         ... 10 more
selenium-distributor  | Caused by: java.lang.reflect.InvocationTargetException
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
selenium-distributor  |         at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-distributor  |         at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:59)
selenium-distributor  |         ... 13 more
selenium-distributor  | Caused by: org.openqa.selenium.json.JsonException: Expected to read a START_MAP but instead have: STRING. Last 0 characters read: , next 38 characters to read: "0e0dcddf-a73b-40e8-a163-dd03c25c6e17"
selenium-distributor  | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor  | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.42.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor  | Driver info: driver.version: unknown
selenium-distributor  |         at org.openqa.selenium.json.JsonInput.expect(JsonInput.java:515)
selenium-distributor  |         at org.openqa.selenium.json.JsonInput.beginObject(JsonInput.java:363)
selenium-distributor  |         at org.openqa.selenium.grid.data.SessionClosedData.fromJson(SessionClosedData.java:144)
selenium-distributor  |         at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-distributor  |         ... 15 more

Operating System

RedHat 9.7 - docker-ce-28.5.2-1

Docker Selenium version (image tag)

4.41.0-20260222

Selenium Grid chart version (chart version)

No response

[github-actions]

@pok2ca, thank you for creating this issue. We will troubleshoot it as soon as we can.

---

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Thank you!

[VietND96]

I don't think compose file is correct to start the Grid. Some endpoint like event bus host using localhost but there is no host port expose. Without host post expose, I think should use the container name in the docker network
Lots of error related to host
selenium-distributor | java.net.UnknownHostException: hidden-host-q-int.hidden-domain: hidden-host-q-int.hidden-domain: Name or service not known

[pok2ca]

Some endpoints are using localhost and not exposing port because network_mode: is set to 'host'.
It is a configuration setting in Docker that bypasses the standard network isolation between a container and its host machine.
When you use this mode, the container does not get its own IP address; instead, it shares the host's networking namespace.

The same configuration running at version 4.38.0-20251101 works fine

[pok2ca]

I changed the docker-compose. I removed network_mode=host.
The error persists

---

below new docker-compose.yml.

---

services:
selenium-event-bus:
image: selenium/event-bus:4.41.0-20260222
restart: unless-stopped
container_name: 'selenium-event-bus'
hostname: 'selenium-event-bus'
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=selenium-event-bus'
selenium-sessions:
image: selenium/sessions:4.41.0-20260222
restart: unless-stopped
container_name: 'selenium-sessions'
hostname: 'selenium-sessions'
depends_on:
- selenium-event-bus
environment:
- SE_EVENT_BUS_HOST=selenium-event-bus
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=selenium_sessions'
selenium-session-queue:
image: selenium/session-queue:4.41.0-20260222
restart: unless-stopped
container_name: 'selenium-session-queue'
hostname: 'selenium-session-queue'
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=selenium_session_queue'
selenium-distributor:
image: selenium/distributor:4.41.0-20260222
restart: unless-stopped
container_name: 'selenium-distributor'
hostname: 'selenium-distributor'
depends_on:
- selenium-event-bus
- selenium-sessions
- selenium-session-queue
environment:
- SE_EVENT_BUS_HOST=selenium-event-bus
- SE_SESSIONS_MAP_HOST=selenium-sessions
- SE_SESSION_QUEUE_HOST=selenium-session-queue
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=selenium_distributor'
selenium-router:
image: selenium/router:4.41.0-20260222
restart: unless-stopped
container_name: 'selenium-router'
hostname: 'selenium-router'
depends_on:
- selenium-distributor
- selenium-sessions
- selenium-session-queue
environment:
- SE_DISTRIBUTOR_HOST=selenium-distributor
- SE_SESSIONS_MAP_HOST=selenium-sessions
- SE_SESSION_QUEUE_HOST=selenium-session-queue
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=selenium_router'
chrome:
image: selenium/node-chrome:136.0-20251101
restart: unless-stopped
container_name: 'chrome'
hostname: 'chrome'
platform: linux/amd64
shm_size: 2gb
depends_on:
- selenium-event-bus
volumes:
- /etc/ssl:/etc/ssl:ro
environment:
- SE_EVENT_BUS_HOST=selenium-event-bus
- SE_VNC_NO_PASSWORD=true
- SE_VNC_VIEW_ONLY=true
- SE_NODE_MAX_SESSIONS=5
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=chrome'
edge:
image: selenium/node-edge:142.0-20251101
restart: unless-stopped
container_name: 'edge'
hostname: 'edge'
platform: linux/amd64
shm_size: 2gb
depends_on:
- selenium-event-bus
volumes:
- /etc/ssl:/etc/ssl:ro
environment:
- SE_EVENT_BUS_HOST=selenium-event-bus
- SE_VNC_NO_PASSWORD=true
- SE_VNC_VIEW_ONLY=true
- SE_NODE_MAX_SESSIONS=5
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=edge'
firefox:
image: selenium/node-firefox:144.0.2-20251101
restart: unless-stopped
container_name: 'firefox'
hostname: 'firefox'
shm_size: 2gb
depends_on:
- selenium-event-bus
volumes:
- /etc/ssl:/etc/ssl:ro
environment:
- SE_EVENT_BUS_HOST=selenium-event-bus
- SE_VNC_NO_PASSWORD=true
- SE_VNC_VIEW_ONLY=true
- SE_NODE_MAX_SESSIONS=5
logging:
driver: 'journald'
options:
tag: 'docker_container: containerName=firefox'

---

Below docker compose logs:

---

selenium-distributor | 21:21:05.317 INFO [LocalDistributor.newSession] - Session request received by the Distributor:
selenium-distributor | [Capabilities {browserName: chrome, goog:chromeOptions: {args: [--no-sandbox, --disable-dev-shm-usage, --disable-gpu], extensions: []}, pageLoadStrategy: normal, se:name: Selenium Grid Remote Test, se:recordVideo: true, se:timeouts: {session: 300}}]
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:09 +0000] "POST /graphql HTTP/1.1" 200 286 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
chrome | 21:21:08.926 INFO [LocalNode.newSession] - Session created by the Node. Id: a3aedb1b7bc8894ebf0606214ee47283, Caps: Capabilities {acceptInsecureCerts: false, browserName: chrome, browserVersion: 136.0.7103.113, chrome: {chromedriverVersion: 136.0.7103.113 (76fa3c17824..., userDataDir: /tmp/.org.chromium.Chromium...}, fedcm:accounts: true, goog:chromeOptions: {debuggerAddress: localhost:33801}, networkConnectionEnabled: false, pageLoadStrategy: normal, platformName: linux, proxy: Proxy(), se:bidiEnabled: false, se:cdp: ws://172.18.0.8:4444/sessio..., se:cdpVersion: 136.0.7103.113, se:containerName: chrome, se:deleteSessionOnUi: true, se:downloadsEnabled: true, se:name: Selenium Grid Remote Test, se:noVncPort: 7900, se:recordVideo: true, se:timeouts: {session: 300}, se:vnc: ws://172.18.0.8:4444/sessio..., se:vncEnabled: true, se:vncLocalAddress: ws://172.18.0.8:7900, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify, webauthn:extension:credBlob: true, webauthn:extension:largeBlob: true, webauthn:extension:minPinLength: true, webauthn:extension:prf: true, webauthn:virtualAuthenticators: true}
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:09 +0000] "POST /graphql HTTP/1.1" 200 148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:09 +0000] "POST /graphql HTTP/1.1" 200 1148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:09 +0000] "POST /wd/hub/session HTTP/1.1" 200 1807 "-" "selenium/4.41.0 (python win32)" "-"
selenium-sessions | 21:21:09.225 INFO [LocalSessionMap.add] - Added session to local Session Map, Id: a3aedb1b7bc8894ebf0606214ee47283, Node: http://172.18.0.8:5555
selenium-distributor | 21:21:09.241 INFO [LocalDistributor.newSession] - Session created by the Distributor. Id: a3aedb1b7bc8894ebf0606214ee47283
selenium-distributor | Caps: Capabilities {acceptInsecureCerts: false, browserName: chrome, browserVersion: 136.0.7103.113, chrome: {chromedriverVersion: 136.0.7103.113 (76fa3c17824..., userDataDir: /tmp/.org.chromium.Chromium...}, fedcm:accounts: true, goog:chromeOptions: {debuggerAddress: localhost:33801}, networkConnectionEnabled: false, pageLoadStrategy: normal, platformName: linux, proxy: {}, se:bidiEnabled: false, se:cdp: ws://172.18.0.8:4444/sessio..., se:cdpVersion: 136.0.7103.113, se:containerName: chrome, se:deleteSessionOnUi: true, se:downloadsEnabled: true, se:name: Selenium Grid Remote Test, se:noVncPort: 7900, se:recordVideo: true, se:timeouts: {session: 300}, se:vnc: ws://172.18.0.8:4444/sessio..., se:vncEnabled: true, se:vncLocalAddress: ws://172.18.0.8:7900, setWindowRect: true, strictFileInteractability: false, timeouts: {implicit: 0, pageLoad: 300000, script: 30000}, unhandledPromptBehavior: dismiss and notify, webauthn:extension:credBlob: true, webauthn:extension:largeBlob: true, webauthn:extension:minPinLength: true, webauthn:extension:prf: true, webauthn:virtualAuthenticators: true}
nginx | 2026/04/12 21:21:09 [warn] 21#21: *135 a client request body is buffered to a temporary file /var/cache/nginx/client_temp/0000000001, client: 10.234.226.104, server: hidden-host-q.hidden-domain, request: "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1", host: "hidden-host-q.hidden-domain"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:10 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:12 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:12 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.794FA07AA23DA746142E543288E8B4D2.e.8/text HTTP/1.1" 200 37 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:12 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/elements HTTP/1.1" 200 361 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:13 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:13 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.794FA07AA23DA746142E543288E8B4D2.e.12/text HTTP/1.1" 200 92 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 2026/04/12 21:21:13 [warn] 21#21: *135 a client request body is buffered to a temporary file /var/cache/nginx/client_temp/0000000002, client: 10.234.226.104, server: hidden-host-q.hidden-domain, request: "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1", host: "hidden-host-q.hidden-domain"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:13 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:14 +0000] "POST /graphql HTTP/1.1" 200 286 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:14 +0000] "POST /graphql HTTP/1.1" 200 2879 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:14 +0000] "POST /graphql HTTP/1.1" 200 1148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:15 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:15 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.6/text HTTP/1.1" 200 13 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:15 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:16 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.7/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:17 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.6/text HTTP/1.1" 200 13 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.140.168.164 - - [12/Apr/2026:21:21:17 +0000] "GET / HTTP/1.1" 302 0 "-" "Blackbox-Exporter/0.28.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:17 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.7/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:19 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.6/text HTTP/1.1" 200 13 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:19 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:19 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.10/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:20 +0000] "POST /graphql HTTP/1.1" 200 286 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:20 +0000] "POST /graphql HTTP/1.1" 200 1148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:20 +0000] "POST /graphql HTTP/1.1" 200 2880 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:20 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.6/text HTTP/1.1" 200 13 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:21 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:21 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.11/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:22 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.79F413A03EA4F91EBF4CE37A3DCA5FE8.e.6/text HTTP/1.1" 200 13 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 2026/04/12 21:21:23 [warn] 21#21: *135 a client request body is buffered to a temporary file /var/cache/nginx/client_temp/0000000003, client: 10.234.226.104, server: hidden-host-q.hidden-domain, request: "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1", host: "hidden-host-q.hidden-domain"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:23 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:24 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:24 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.6/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:25 +0000] "POST /graphql HTTP/1.1" 200 2880 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:25 +0000] "POST /graphql HTTP/1.1" 200 1148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:25 +0000] "POST /graphql HTTP/1.1" 200 286 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:26 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:26 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:26 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.21/text HTTP/1.1" 200 28 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:26 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.22/text HTTP/1.1" 200 29 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:27 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:27 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:27 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.2/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:28 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.3/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:28 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.6/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:29 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:30 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.22/text HTTP/1.1" 200 29 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:30 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.2/clear HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:30 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.3/clear HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:31 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.2/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:31 +0000] "POST /graphql HTTP/1.1" 200 286 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:31 +0000] "POST /graphql HTTP/1.1" 200 2880 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:31 +0000] "POST /graphql HTTP/1.1" 200 1148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:31 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.3/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:31 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.6/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:33 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:33 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.1EC53E27E4F378DD8A8A16E2BD7C1467.e.27/text HTTP/1.1" 200 81 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 2026/04/12 21:21:33 [warn] 21#21: *135 a client request body is buffered to a temporary file /var/cache/nginx/client_temp/0000000004, client: 10.234.226.104, server: hidden-host-q.hidden-domain, request: "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1", host: "hidden-host-q.hidden-domain"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:33 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/url HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:35 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:35 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 125 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:35 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.4/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:35 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.7/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:36 +0000] "POST /graphql HTTP/1.1" 200 286 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:36 +0000] "POST /graphql HTTP/1.1" 200 1148 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:36 +0000] "POST /graphql HTTP/1.1" 200 2880 "https://hidden-host-q.hidden-domain/ui/" "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/146.0.0.0 Safari/537.36 Edg/146.0.0.0" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:37 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:37 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.22/elements HTTP/1.1" 200 128 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:37 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.4/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:38 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.7/click HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:39 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.22/elements HTTP/1.1" 200 245 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:39 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element HTTP/1.1" 200 126 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:40 +0000] "GET /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.25/text HTTP/1.1" 200 35 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:40 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.4/value HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:41 +0000] "POST /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283/element/f.2036BA1850B22BAE10EE94F45454C198.d.2380470BE71BCE9DE91C57AB6E85EE18.e.22/elements HTTP/1.1" 200 362 "-" "selenium/4.41.0 (python win32)" "-"
selenium-distributor | 21:21:42.045 WARN [UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2] - Caught exception from listener: org.openqa.selenium.events.EventListener@29d6aa3f
selenium-distributor | org.openqa.selenium.json.JsonException: Unable to parse: "a3aedb1b7bc8894ebf0606214ee47283"
selenium-distributor | at org.openqa.selenium.json.Json.toType(Json.java:170)
selenium-distributor | at org.openqa.selenium.json.Json.toType(Json.java:153)
selenium-distributor | at org.openqa.selenium.events.Event.getData(Event.java:58)
selenium-distributor | at org.openqa.selenium.events.EventListener.accept(EventListener.java:42)
selenium-distributor | at org.openqa.selenium.events.EventListener.accept(EventListener.java:24)
selenium-distributor | at org.openqa.selenium.events.zeromq.UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2(UnboundZmqEventBus.java:332)
selenium-distributor | at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
selenium-distributor | at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
selenium-distributor | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
selenium-distributor | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
selenium-distributor | at java.base/java.lang.Thread.run(Thread.java:1583)
selenium-distributor | Caused by: org.openqa.selenium.json.JsonException: Unable to create instance of class org.openqa.selenium.grid.data.SessionClosedData
selenium-distributor | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.47.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor | Driver info: driver.version: unknown
selenium-distributor | at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:61)
selenium-distributor | at org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:143)
selenium-distributor | at org.openqa.selenium.json.Json.toType(Json.java:205)
selenium-distributor | at org.openqa.selenium.json.Json.toType(Json.java:168)
selenium-distributor | ... 10 more
selenium-distributor | Caused by: java.lang.reflect.InvocationTargetException
selenium-distributor | at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
selenium-distributor | at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-distributor | at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:59)
selenium-distributor | ... 13 more
selenium-distributor | Caused by: org.openqa.selenium.json.JsonException: Expected to read a START_MAP but instead have: STRING. Last 0 characters read: , next 34 characters to read: "a3aedb1b7bc8894ebf0606214ee47283"
selenium-distributor | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-distributor | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.47.1.el9_7.x86_64', java.version: '21.0.10'
selenium-distributor | Driver info: driver.version: unknown
selenium-distributor | at org.openqa.selenium.json.JsonInput.expect(JsonInput.java:515)
selenium-distributor | at org.openqa.selenium.json.JsonInput.beginObject(JsonInput.java:363)
selenium-distributor | at org.openqa.selenium.grid.data.SessionClosedData.fromJson(SessionClosedData.java:144)
selenium-distributor | at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-distributor | ... 15 more
nginx | 10.234.226.104 - - [12/Apr/2026:21:21:42 +0000] "DELETE /wd/hub/session/a3aedb1b7bc8894ebf0606214ee47283 HTTP/1.1" 200 14 "-" "selenium/4.41.0 (python win32)" "-"
chrome | 21:21:42.011 INFO [LocalNode.stopTimedOutSession] - Session id a3aedb1b7bc8894ebf0606214ee47283 is stopping on demand...
selenium-sessions | 21:21:42.049 WARN [UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2] - Caught exception from listener: org.openqa.selenium.events.EventListener@640afe82
selenium-sessions | org.openqa.selenium.json.JsonException: Unable to parse: "a3aedb1b7bc8894ebf0606214ee47283"
selenium-sessions | at org.openqa.selenium.json.Json.toType(Json.java:170)
selenium-sessions | at org.openqa.selenium.json.Json.toType(Json.java:153)
selenium-sessions | at org.openqa.selenium.events.Event.getData(Event.java:58)
selenium-sessions | at org.openqa.selenium.events.EventListener.accept(EventListener.java:42)
selenium-sessions | at org.openqa.selenium.events.EventListener.accept(EventListener.java:24)
selenium-sessions | at org.openqa.selenium.events.zeromq.UnboundZmqEventBus$PollingRunnable.lambda$notifyListeners$2(UnboundZmqEventBus.java:332)
selenium-sessions | at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:572)
selenium-sessions | at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:317)
selenium-sessions | at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1144)
selenium-sessions | at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:642)
selenium-sessions | at java.base/java.lang.Thread.run(Thread.java:1583)
selenium-sessions | Caused by: org.openqa.selenium.json.JsonException: Unable to create instance of class org.openqa.selenium.grid.data.SessionClosedData
selenium-sessions | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-sessions | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.47.1.el9_7.x86_64', java.version: '21.0.10'
selenium-sessions | Driver info: driver.version: unknown
selenium-sessions | at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:61)
selenium-sessions | at org.openqa.selenium.json.JsonTypeCoercer.coerce(JsonTypeCoercer.java:143)
selenium-sessions | at org.openqa.selenium.json.Json.toType(Json.java:205)
selenium-sessions | at org.openqa.selenium.json.Json.toType(Json.java:168)
selenium-sessions | ... 10 more
selenium-sessions | Caused by: java.lang.reflect.InvocationTargetException
selenium-sessions | at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:118)
selenium-sessions | at java.base/java.lang.reflect.Method.invoke(Method.java:580)
selenium-sessions | at org.openqa.selenium.json.StaticInitializerCoercer.lambda$apply$0(StaticInitializerCoercer.java:59)
selenium-sessions | ... 13 more
selenium-sessions | Caused by: org.openqa.selenium.json.JsonException: Expected to read a START_MAP but instead have: STRING. Last 0 characters read: , next 34 characters to read: "a3aedb1b7bc8894ebf0606214ee47283"
selenium-sessions | Build info: version: '4.41.0', revision: '9fc754f90a'
selenium-sessions | System info: os.name: 'Linux', os.arch: 'amd64', os.version: '5.14.0-611.47.1.el9_7.x86_64', java.version: '21.0.10'
selenium-sessions | Driver info: driver.version: unknown
selenium-sessions | at org.openqa.selenium.json.JsonInput.expect(JsonInput.java:515)
selenium-sessions | at org.openqa.selenium.json.JsonInput.beginObject(JsonInput.java:363)
selenium-sessions | at org.openqa.selenium.grid.data.SessionClosedData.fromJson(SessionClosedData.java:144)
selenium-sessions | at java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103)
selenium-sessions | ... 15 more
chrome | 21:21:42.012 INFO [SessionSlot.stop] - Stopping session a3aedb1b7bc8894ebf0606214ee47283

---

session not released

---

{
"acceptInsecureCerts": false,
"browserName": "chrome",
"browserVersion": "136.0.7103.113",
"chrome": {
"chromedriverVersion": "136.0.7103.113 (76fa3c1782406c63308c70b54f228fd39c7aaa71-refs/branch-heads/7103_108@{#3})",
"userDataDir": "/tmp/.org.chromium.Chromium.EK5D7I"
},
"fedcm:accounts": true,
"goog:chromeOptions": {
"debuggerAddress": "localhost:33801"
},
"networkConnectionEnabled": false,
"pageLoadStrategy": "normal",
"platformName": "linux",
"proxy": {},
"se:bidiEnabled": false,
"se:cdp": "ws://172.18.0.8:4444/session/a3aedb1b7bc8894ebf0606214ee47283/se/cdp",
"se:cdpVersion": "136.0.7103.113",
"se:containerName": "chrome",
"se:deleteSessionOnUi": true,
"se:downloadsEnabled": true,
"se:name": "Selenium Grid Remote Test",
"se:noVncPort": 7900,
"se:recordVideo": true,
"se:timeouts": {
"session": 300
},
"se:vnc": "ws://172.18.0.8:4444/session/a3aedb1b7bc8894ebf0606214ee47283/se/vnc",
"se:vncEnabled": true,
"se:vncLocalAddress": "ws://172.18.0.8:7900",
"setWindowRect": true,
"strictFileInteractability": false,
"timeouts": {
"implicit": 0,
"pageLoad": 300000,
"script": 30000
},
"unhandledPromptBehavior": "dismiss and notify",
"webauthn:extension:credBlob": true,
"webauthn:extension:largeBlob": true,
"webauthn:extension:minPinLength": true,
"webauthn:extension:prf": true,
"webauthn:virtualAuthenticators": true
}

[pok2ca]

After deploying the latest released version: 4.43.0-20260404 the issue is gone.

[VietND96]

@pok2ca, looks like a backward compatibility issue with the new event bus SessionClosed data contract, since Hub components (Router, EventBus, Distributor, SessionMap) is using 4.41.0-20260222, while Nodes are 136.0-20251101, etc. (which is using Grid version < 4.41.0)
We will fix the backward compatibility in Grid core.
Meanwhile the workaround is using Node with Grid version 4.41.0+. In case you want to use a backward browser version, you can use image tag 136.0-20260404