selenium [🐛 Bug]: Intermittent session errors on previously stable test suite

What happened?

Firstly, thanks for Selenium :pray: We've been using it for 15 years, and have built a large and useful automated test suite with it :heart:

Recently we've been seeing intermittent session errors, in tests that have run (in some cases for years) without issues. These happen at various times in the test lifecycle, from before(:each) to after(:suite). They take the form:

[2024-10-04T05:14:52Z]   1) play playlist in fullscreen mode
[2024-10-04T05:14:52Z]      Got 0 failures and 4 other errors:
[2024-10-04T05:14:52Z]
[2024-10-04T05:14:52Z]      1.1) Failure/Error: super(*args, **kwargs.except(:skip_waiting_for_load))
[2024-10-04T05:14:52Z]
[2024-10-04T05:14:52Z]           Selenium::WebDriver::Error::UnknownError:
[2024-10-04T05:14:52Z]             Unable to execute request for an existing session: java.util.concurrent.TimeoutException
[2024-10-04T05:14:52Z]             Build info: version: '4.20.0', revision: '866c76ca80'
[2024-10-04T05:14:52Z]             System info: os.name: 'Linux', os.arch: 'aarch64', os.version: '6.1.106-116.188.amzn2023.aarch64', java.version: '17.0.11'
[2024-10-04T05:14:52Z]             Driver info: driver.version: unknown
[2024-10-04T05:14:52Z]           # ./spec/support/helpers/test_helpers/capybara_helpers.rb:7:in `visit'
[2024-10-04T05:14:52Z]           # ./spec/features/fullscreen/playlist_spec.rb:33:in `block (2 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./spec/rails_helper.rb:135:in `block (3 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./spec/rails_helper.rb:134:in `block (2 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./spec/support/good_job.rb:7:in `block (2 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./spec/support/database_cleaner.rb:19:in `block (2 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./spec/spec_helper.rb:177:in `block (4 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./app/lib/tiny_otel.rb:86:in `in_span'
[2024-10-04T05:14:52Z]           # ./spec/spec_helper.rb:176:in `block (3 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ./spec/spec_helper.rb:163:in `block (2 levels) in <top (required)>'
[2024-10-04T05:14:52Z]           # ------------------
[2024-10-04T05:14:52Z]           # --- Caused by: ---
[2024-10-04T05:14:52Z]           # Selenium::WebDriver::Error::WebDriverError:
[2024-10-04T05:14:52Z]           #   java.lang.RuntimeException: Unable to execute request for an existing session: java.util.concurrent.TimeoutException

Retrying the test will often cause it to pass.

We tried reproducing the failures locally. This was unsuccessful; the failures only happen in CI (running through Buildkite, inside Docker containers).

We then took the following steps to try to eliminate other causes of the intermittent failures. All were unsuccessful.

Specifying a custom HTTP client and increasing the timeout.
Backing off and retrying in the case of these errors.
Upgrading selenium-webdriver Gem to the very latest version (4.25.0).
Upgrading to Chrome 124 from 117.
Connecting to a running CI agent and inspecting. Nothing seemed amiss. CPU, memory, usage all normal.
Bumping shm allocation to 8GiB from 2GiB on the containers.
Downloading system logs from CI agents while running to check for OOM killing.
Detaching a CI instance from Buildkite, and run the tests manually there. The intermittent session errors persisted.
Doubling the size of the CI agents from c7g.8xlarge to c7g.16xlarge, in case of resource constraints.
Switching from Chrome to Firefox (I was particularly surprised that this didn't resolve the issue).
Explicitly closing the session at the end of every suite.
Removing all session resets from tests and helpers.
Trying x86 instead of ARM build agents.
Running just one test group manually. This also produced the same session errors, eliminating the sheer number of tests, or the number of parallel Docker containers.
Downgrading selenium-webdriver to a version from 2023.
Installing Chromium and Chromedriver locally on the test container, instead of using a remote browser configuration across containers. This produced the same session errors, but with a local failure message.

We also tested switching from Selenium to Cuprite; when running under Cuprite, the tests worked reliably, which led us to believe the issue lies with Selenium.

How can we reproduce the issue?

We can't reproduce this outside the context of our CI system; however the debugging steps above lead me to believe it's an issue with Selenium.

If debugging on our stack could help resolve the issue, I'm very happy to look into how we might make that possible.

Relevant log output

When running Chrome in its own container via a remote browser connection, this is what we see in the logs when one of these failures occur:

2024-10-07 05:37:09 DEBUG Selenium [:command] -> GET session/c000c2996cd5f723ea858b5e9a58281b/window 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["44"], "content-type"=>["application/json; charset=utf-8"], "cache-control"=>["no-cache"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {"value":"316ADB5F14A7C4783939C2D19625AD72"} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> POST session/c000c2996cd5f723ea858b5e9a58281b/window/rect 
2024-10-07 05:37:09 DEBUG Selenium [:command]    >>> http://chrome:4444/wd/hub/session/c000c2996cd5f723ea858b5e9a58281b/window/rect | {"x":null,"y":null,"width":1920,"height":1080} 
2024-10-07 05:37:09 DEBUG Selenium [:header]      > {"Accept"=>"application/json", "Content-Type"=>"application/json; charset=UTF-8", "User-Agent"=>"selenium/4.25.0 (ruby linux)", "Content-Length"=>"46"} 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["50"], "content-type"=>["application/json; charset=utf-8"], "cache-control"=>["no-cache"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {"value":{"height":1080,"width":1920,"x":0,"y":0}} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> POST session/c000c2996cd5f723ea858b5e9a58281b/goog/cdp/execute 
2024-10-07 05:37:09 DEBUG Selenium [:command]    >>> http://chrome:4444/wd/hub/session/c000c2996cd5f723ea858b5e9a58281b/goog/cdp/execute | {"cmd":"Emulation.setUserAgentOverride","params":{"userAgent":"Mozilla/5.0 (X11; Linux x86_64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/118.0.0.0 Safari/537.36"}} 
2024-10-07 05:37:09 DEBUG Selenium [:header]      > {"Accept"=>"application/json", "Content-Type"=>"application/json; charset=UTF-8", "User-Agent"=>"selenium/4.25.0 (ruby linux)", "Content-Length"=>"167"} 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["12"], "content-type"=>["application/json; charset=utf-8"], "cache-control"=>["no-cache"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {"value":{}} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> POST session/c000c2996cd5f723ea858b5e9a58281b/goog/cdp/execute 
2024-10-07 05:37:09 DEBUG Selenium [:command]    >>> http://chrome:4444/wd/hub/session/c000c2996cd5f723ea858b5e9a58281b/goog/cdp/execute | {"cmd":"Emulation.setTouchEmulationEnabled","params":{"enabled":false}} 
2024-10-07 05:37:09 DEBUG Selenium [:header]      > {"Accept"=>"application/json", "Content-Type"=>"application/json; charset=UTF-8", "User-Agent"=>"selenium/4.25.0 (ruby linux)", "Content-Length"=>"71"} 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["12"], "content-type"=>["application/json; charset=utf-8"], "cache-control"=>["no-cache"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {"value":{}} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> POST session/c000c2996cd5f723ea858b5e9a58281b/goog/cdp/execute 
2024-10-07 05:37:09 DEBUG Selenium [:command]    >>> http://chrome:4444/wd/hub/session/c000c2996cd5f723ea858b5e9a58281b/goog/cdp/execute | {"cmd":"Emulation.clearDeviceMetricsOverride","params":{}} 
2024-10-07 05:37:09 DEBUG Selenium [:header]      > {"Accept"=>"application/json", "Content-Type"=>"application/json; charset=UTF-8", "User-Agent"=>"selenium/4.25.0 (ruby linux)", "Content-Length"=>"58"} 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["12"], "content-type"=>["application/json; charset=utf-8"], "cache-control"=>["no-cache"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {"value":{}} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> POST session/c000c2996cd5f723ea858b5e9a58281b/url 
2024-10-07 05:37:09 DEBUG Selenium [:command]    >>> http://chrome:4444/wd/hub/session/c000c2996cd5f723ea858b5e9a58281b/url | {"url":"http://test.host:30000/playlists/874/edit"} 
2024-10-07 05:37:09 DEBUG Selenium [:header]      > {"Accept"=>"application/json", "Content-Type"=>"application/json; charset=UTF-8", "User-Agent"=>"selenium/4.25.0 (ruby linux)", "Content-Length"=>"51"} 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["5228"], "cache-control"=>["none"], "content-type"=>["application/json; charset=utf-8"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {
  "value": {
    "error": "unknown error",
    "message": "Unable to execute request for an existing session: java.util.concurrent.TimeoutException\nBuild info: version: '4.20.0', revision: '866c76ca80'\nSystem info: os.name: 'Linux', os.arch: 'aarch64', os.version: '6.1.106-116.188.amzn2023.aarch64', java.version: '17.0.11'\nDriver info: driver.version: unknown",
    "stacktrace": "java.lang.RuntimeException: Unable to execute request for an existing session: java.util.concurrent.TimeoutException\nBuild info: version: '4.20.0', revision: '866c76ca80'\nSystem info: os.name: 'Linux', os.arch: 'aarch64', os.version: '6.1.106-116.188.amzn2023.aarch64', java.version: '17.0.11'\nDriver info: driver.version: unknown\n\tat org.openqa.selenium.grid.router.HandleSession.execute(HandleSession.java:208)\n\tat org.openqa.selenium.remote.http.Route$PredicatedRoute.handle(Route.java:383)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.grid.router.Router.execute(Router.java:87)\n\tat org.openqa.selenium.grid.web.EnsureSpecCompliantResponseHeaders.lambda$apply$0(EnsureSpecCompliantResponseHeaders.java:34)\n\tat org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.http.Route$NestedRoute.handle(Route.java:270)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.AddWebDriverSpecHeaders.lambda$apply$0(AddWebDriverSpecHeaders.java:35)\n\tat org.openqa.selenium.remote.ErrorFilter.lambda$apply$0(ErrorFilter.java:44)\n\tat org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)\n\tat org.openqa.selenium.remote.ErrorFilter.lambda$apply$0(ErrorFilter.java:44)\n\tat org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)\n\tat org.openqa.selenium.netty.server.SeleniumHandler.lambda$channelRead0$0(SeleniumHandler.java:44)\n\tat java.base\u002fjava.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)\n\tat java.base\u002fjava.util.concurrent.FutureTask.run(Unknown Source)\n\tat java.base\u002fjava.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)\n\tat java.base\u002fjava.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)\n\tat java.base\u002fjava.lang.Thread.run(Unknown Source)\nCaused by: java.util.concurrent.TimeoutException\n\tat java.base\u002fjava.util.concurrent.CompletableFuture.timedGet(Unknown Source)\n\tat java.base\u002fjava.util.concurrent.CompletableFuture.get(Unknown Source)\n\tat org.openqa.selenium.remote.http.jdk.JdkHttpClient.execute0(JdkHttpClient.java:379)\n\tat org.openqa.selenium.remote.http.AddSeleniumUserAgent.lambda$apply$0(AddSeleniumUserAgent.java:42)\n\tat org.openqa.selenium.remote.http.Filter.lambda$andFinally$1(Filter.java:55)\n\tat org.openqa.selenium.remote.http.jdk.JdkHttpClient.execute(JdkHttpClient.java:352)\n\tat org.openqa.selenium.remote.tracing.TracedHttpClient.execute(TracedHttpClient.java:54)\n\tat org.openqa.selenium.grid.web.ReverseProxyHandler.execute(ReverseProxyHandler.java:90)\n\tat org.openqa.selenium.grid.node.DefaultActiveSession.execute(DefaultActiveSession.java:62)\n\tat org.openqa.selenium.grid.node.local.SessionSlot.execute(SessionSlot.java:126)\n\tat org.openqa.selenium.grid.node.local.LocalNode.executeWebDriverCommand(LocalNode.java:628)\n\tat org.openqa.selenium.grid.node.ForwardWebDriverCommand.execute(ForwardWebDriverCommand.java:35)\n\tat org.openqa.selenium.remote.http.Route$PredicatedRoute.handle(Route.java:383)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.remote.tracing.SpanWrappedHttpHandler.execute(SpanWrappedHttpHandler.java:87)\n\tat org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)\n\tat org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)\n\tat org.openqa.selenium.remote.http.Route.execute(Route.java:69)\n\tat org.openqa.selenium.grid.node.Node.execute(Node.java:262)\n\tat org.openqa.selenium.grid.web.CombinedHandler.execute(CombinedHandler.java:55)\n\tat org.openqa.selenium.grid.web.RoutableHttpClientFactory$1.execute(RoutableHttpClientFactory.java:71)\n\tat org.openqa.selenium.grid.web.ReverseProxyHandler.execute(ReverseProxyHandler.java:90)\n\tat org.openqa.selenium.grid.router.HandleSession.execute(HandleSession.java:181)\n\t... 30 more\n"
  }
} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> GET session/c000c2996cd5f723ea858b5e9a58281b/screenshot 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["252"], "cache-control"=>["no-cache"], "content-type"=>["application/json; charset=utf-8"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {
  "value": "\u002fsession\u002fc000c2996cd5f723ea858b5e9a58281b\u002fscreenshot",
  "message": "Unable to route (GET) \u002fsession\u002fc000c2996cd5f723ea858b5e9a58281b\u002fscreenshot",
  "error": "org.openqa.selenium.UnsupportedCommandException"
} 
2024-10-07 05:37:09 DEBUG Selenium [:command] -> DELETE session/c000c2996cd5f723ea858b5e9a58281b/cookie 
2024-10-07 05:37:09 DEBUG Selenium [:header]    <<<  {"content-length"=>["247"], "cache-control"=>["no-cache"], "content-type"=>["application/json; charset=utf-8"]} 
2024-10-07 05:37:09 DEBUG Selenium [:command] <- {
  "value": "\u002fsession\u002fc000c2996cd5f723ea858b5e9a58281b\u002fcookie",
  "message": "Unable to route (DELETE) \u002fsession\u002fc000c2996cd5f723ea858b5e9a58281b\u002fcookie",
  "error": "org.openqa.selenium.UnsupportedCommandException"
} 
2024-10-07 05:42:12 DEBUG Selenium [:command] -> DELETE session/c000c2996cd5f723ea858b5e9a58281b 
2024-10-07 05:42:12 DEBUG Selenium [:header]    <<<  {"content-length"=>["223"], "cache-control"=>["no-cache"], "content-type"=>["application/json; charset=utf-8"]} 
2024-10-07 05:42:12 DEBUG Selenium [:command] <- {
  "value": "\u002fsession\u002fc000c2996cd5f723ea858b5e9a58281b",
  "message": "Unable to route (DELETE) \u002fsession\u002fc000c2996cd5f723ea858b5e9a58281b",
  "error": "org.openqa.selenium.UnsupportedCommandException"
}

When running Chromium locally on the test container, we see the following error:

 1.1) Failure/Error: page.driver.resize_window_to(page.driver.current_window_handle, 1920, 1080)   
                                                                                                       
          Selenium::WebDriver::Error::WebDriverError:                                                  
            unable to connect to /root/.cache/selenium/chromedriver/linux64/129.0.6668.89/chromedriver 
127.0.0.1:9515                                     
          # ./spec/support/selenium.rb:31:in `block (2 levels) in <top (required)>'                    
          # ./spec/rails_helper.rb:135:in `block (3 levels) in <top (required)>'                       
          # ./spec/rails_helper.rb:134:in `block (2 levels) in <top (required)>'                       
          # ./spec/support/good_job.rb:7:in `block (2 levels) in <top (required)>'                     
          # ./spec/support/database_cleaner.rb:19:in `block (2 levels) in <top (required)>'            
          # ./spec/spec_helper.rb:177:in `block (4 levels) in <top (required)>'                        
          # ./app/lib/tiny_otel.rb:86:in `in_span'
          # ./spec/spec_helper.rb:176:in `block (3 levels) in <top (required)>'
          # ./spec/spec_helper.rb:163:in `block (2 levels) in <top (required)>'

Operating System

Ubuntu 22.04 LTS

Selenium version

Ruby 3.3.5

What are the browser(s) and version(s) where you see this issue?

Chrome 124, Chrome 117, Firefox 130.

What are the browser driver(s) and version(s) where you see this issue?

ChromeDriver 124.0.6367.78 (and others; see above for attempts to resolve the issue).

Are you using Selenium Grid?

No.

Oct 08 '24 23:10 duncan-bayne

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

Info for maintainers

Triage this issue by using labels.

If information is missing, add a helpful comment and then I-issue-template label.

If the issue is a question, add the I-question label.

If the issue is valid but there is no time to troubleshoot it, consider adding the help wanted label.

If the issue requires changes or fixes from an external project (e.g., ChromeDriver, GeckoDriver, MSEdgeDriver, W3C), add the applicable G-* label, and it will provide the correct link and auto-close the issue.

After troubleshooting the issue, please add the R-awaiting answer label.

Thank you!

Oct 08 '24 23:10 github-actions[bot]

@duncan-bayne Could you try to set pageLoadStrategy to eager and check the script does continue? If it does continue the browser is unable to load the page before the session-timeout is hit.

Oct 09 '24 15:10 joerg1985

@joerg1985 Afraid it didn't continue after I made the following change to our helper method that builds the Chromedriver options:

# Generates chromedriver options.
# Yields the options instance to the block param, if it's present
def Capybara.generate_chromedriver(app, &blk)
  options = Selenium::WebDriver::Chrome::Options.new
  options.logging_prefs = {browser: "ALL", performance: "ALL"}
  options.perf_logging_prefs = {enable_network: true}
  options.page_load_strategy = :eager  # <= added
  # ... snip ...

It's worth mentioning that some of these failures are happening at points where we do something completely innocuous like visit("about:blank").

Oct 09 '24 21:10 duncan-bayne

Does this only happen when calling a URL or are other commands affected?

Oct 10 '24 20:10 joerg1985

The pattern is that the error occurs on a visit or a resize_window_to, but then subsequent commands (usually save_screenshot in our after hook) fail as well. E.g.:

[2024-10-01T03:55:16Z] Failures:
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]   1) viewing a changeset an article with MCQs 
[2024-10-01T03:55:16Z]      Got 0 failures and 3 other errors:
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]      1.1) Failure/Error: super(*args, **kwargs.except(:skip_waiting_for_load))
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]           Selenium::WebDriver::Error::UnknownError:
[2024-10-01T03:55:16Z]             Unable to execute request for an existing session: java.util.concurrent.TimeoutException
[2024-10-01T03:55:16Z]             Build info: version: '4.20.0', revision: '866c76ca80'
[2024-10-01T03:55:16Z]             System info: os.name: 'Linux', os.arch: 'aarch64', os.version: '6.1.106-116.188.amzn2023.aarch64', java.version: '17.0.11'
[2024-10-01T03:55:16Z]             Driver info: driver.version: unknown
[2024-10-01T03:55:16Z]           # ./spec/support/helpers/test_helpers/capybara_helpers.rb:7:in `visit'
[2024-10-01T03:55:16Z]           # ./spec/features/changesets/show_spec.rb:76:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/rails_helper.rb:135:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/rails_helper.rb:134:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/support/good_job.rb:7:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/support/database_cleaner.rb:19:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:177:in `block (4 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./app/lib/tiny_otel.rb:86:in `in_span'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:176:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:163:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ------------------
[2024-10-01T03:55:16Z]           # --- Caused by: ---
[2024-10-01T03:55:16Z]           # Selenium::WebDriver::Error::WebDriverError:
[2024-10-01T03:55:16Z]           #   java.lang.RuntimeException: Unable to execute request for an existing session: java.util.concurrent.TimeoutException
[2024-10-01T03:55:16Z] Build info: version: '4.20.0', revision: '866c76ca80'
[2024-10-01T03:55:16Z] System info: os.name: 'Linux', os.arch: 'aarch64', os.version: '6.1.106-116.188.amzn2023.aarch64', java.version: '17.0.11'
[2024-10-01T03:55:16Z] Driver info: driver.version: unknown
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.router.HandleSession.execute(HandleSession.java:208)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$PredicatedRoute.handle(Route.java:383)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.router.Router.execute(Router.java:87)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.web.EnsureSpecCompliantResponseHeaders.lambda$apply$0(EnsureSpecCompliantResponseHeaders.java:34)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$NestedRoute.handle(Route.java:270)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.AddWebDriverSpecHeaders.lambda$apply$0(AddWebDriverSpecHeaders.java:35)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.ErrorFilter.lambda$apply$0(ErrorFilter.java:44)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.ErrorFilter.lambda$apply$0(ErrorFilter.java:44)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.netty.server.SeleniumHandler.lambda$channelRead0$0(SeleniumHandler.java:44)
[2024-10-01T03:55:16Z] 	at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
[2024-10-01T03:55:16Z] 	at java.base/java.util.concurrent.FutureTask.run(Unknown Source)
[2024-10-01T03:55:16Z] 	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
[2024-10-01T03:55:16Z] 	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
[2024-10-01T03:55:16Z] 	at java.base/java.lang.Thread.run(Unknown Source)
[2024-10-01T03:55:16Z] Caused by: java.util.concurrent.TimeoutException
[2024-10-01T03:55:16Z] 	at java.base/java.util.concurrent.CompletableFuture.timedGet(Unknown Source)
[2024-10-01T03:55:16Z] 	at java.base/java.util.concurrent.CompletableFuture.get(Unknown Source)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.jdk.JdkHttpClient.execute0(JdkHttpClient.java:379)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.AddSeleniumUserAgent.lambda$apply$0(AddSeleniumUserAgent.java:42)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Filter.lambda$andFinally$1(Filter.java:55)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.jdk.JdkHttpClient.execute(JdkHttpClient.java:352)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.tracing.TracedHttpClient.execute(TracedHttpClient.java:54)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.web.ReverseProxyHandler.execute(ReverseProxyHandler.java:90)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.node.DefaultActiveSession.execute(DefaultActiveSession.java:62)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.node.local.SessionSlot.execute(SessionSlot.java:126)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.node.local.LocalNode.executeWebDriverCommand(LocalNode.java:628)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.node.ForwardWebDriverCommand.execute(ForwardWebDriverCommand.java:35)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$PredicatedRoute.handle(Route.java:383)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.tracing.SpanWrappedHttpHandler.execute(SpanWrappedHttpHandler.java:87)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Filter$1.execute(Filter.java:63)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route$CombinedRoute.handle(Route.java:346)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.remote.http.Route.execute(Route.java:69)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.node.Node.execute(Node.java:262)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.web.CombinedHandler.execute(CombinedHandler.java:55)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.web.RoutableHttpClientFactory$1.execute(RoutableHttpClientFactory.java:71)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.web.ReverseProxyHandler.execute(ReverseProxyHandler.java:90)
[2024-10-01T03:55:16Z] 	at org.openqa.selenium.grid.router.HandleSession.execute(HandleSession.java:181)
[2024-10-01T03:55:16Z] 	... 30 more
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]      1.2) Failure/Error: path = save_screenshot(example.description.first(60) + ".png", full_page: false) # Chromedriver always takes a full page screenshot, but errors if you ask it to do so.
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]           Selenium::WebDriver::Error::ServerError:
[2024-10-01T03:55:16Z]             status code 404; payload {"value"=>"/session/5ce5484ad358bf2f0339e748a2293a21/screenshot", "message"=>"Unable to route (GET) /session/5ce5484ad358bf2f0339e748a2293a21/screenshot", "error"=>"org.openqa.selenium.UnsupportedCommandException"}
[2024-10-01T03:55:16Z]           # ./spec/support/database_cleaner.rb:49:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/rails_helper.rb:135:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/rails_helper.rb:134:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/support/good_job.rb:7:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/support/database_cleaner.rb:19:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:177:in `block (4 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./app/lib/tiny_otel.rb:86:in `in_span'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:176:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:163:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]      1.3) Failure/Error: example.run
[2024-10-01T03:55:16Z] 
[2024-10-01T03:55:16Z]           Selenium::WebDriver::Error::ServerError:
[2024-10-01T03:55:16Z]             status code 404; payload {"value"=>"/session/5ce5484ad358bf2f0339e748a2293a21/cookie", "message"=>"Unable to route (DELETE) /session/5ce5484ad358bf2f0339e748a2293a21/cookie", "error"=>"org.openqa.selenium.UnsupportedCommandException"}
[2024-10-01T03:55:16Z]           # ./spec/rails_helper.rb:135:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/rails_helper.rb:134:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/support/good_job.rb:7:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/support/database_cleaner.rb:19:in `block (2 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:177:in `block (4 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./app/lib/tiny_otel.rb:86:in `in_span'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:176:in `block (3 levels) in <top (required)>'
[2024-10-01T03:55:16Z]           # ./spec/spec_helper.rb:163:in `block (2 levels) in <top (required)>'

Oct 10 '24 23:10 duncan-bayne

This issue is stale because it has been open 280 days with no activity. Remove stale label or comment or this will be closed in 14 days.

May 04 '25 20:05 github-actions[bot]

Some time after filing this issue, we've moved from Selenium to Cuprite, and haven't experienced this issue since.

May 05 '25 00:05 duncan-bayne

I'd be interested in seeing the driver logs and/or the grid logs, not just the Ruby client logs. Something seems to be causing a loss of communication preventing further commands, but this issue includes a lot of details without anything obvious about what changed between when it was stable and when the issues were noticed.

I'll close this since another alternative was found.

May 05 '25 18:05 titusfortner

This issue has been automatically locked since there has not been any recent activity since it was closed. Please open a new issue for related bugs.

Jun 04 '25 22:06 github-actions[bot]