[🐛 Bug]: org.openqa.selenium.WebDriverException: Unable to route (POST) /session/0405a24bf1d06c6ae8402b8d12027934/...

[joerg1985]

What happened?

When executing a command on a just timedout session a WebDriverException: Unable to route ... is raised.

How can we reproduce the issue?

For some seconds after the session timedout there is a inconsistent state, until the sessionCleanupNodeService of the LocalNode did run. The LocalSessionMap still tells the session does exist, but the Node.isSessionOwner does return false. This will prevent the route inside the Node is matched and lead to the WebDriverException: Unable to route ....

Relevant log output

N/A

Operating System

Win 10 x64

Selenium version

4.17.1

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

N/A

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

N/A

Are you using Selenium Grid?

N/A

[github-actions]

@joerg1985, thank you for creating this issue. We will troubleshoot it as soon as we can.

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Thank you!

[diemol]

How do you think Grid should behave in this case? Should the exception be more clear?

[joerg1985]

@diemol At this time the exception is raised the session is allready timed out.
So i would expect a NoSuchSessionException and not something that indicates an grid bug.

[diemol]

Do you know where this exception was shown? I can tweak the response we send to the user.

[joerg1985]

It is raised here:

selenium/java/src/org/openqa/selenium/grid/web/RoutableHttpClientFactory.java

Lines 60 to 68 in 2b59996

	HttpResponse response = new HttpResponse();
	response.setStatus(404);
	response.setContent(
	asJson(
	ImmutableMap.of(
	"value", request.getUri(),
	"message", "Unable to route " + request,
	"error", UnsupportedCommandException.class.getName())));
	return response;

Here the session map still returns the session, but the following ownership check fails:

selenium/java/src/org/openqa/selenium/grid/node/Node.java

Lines 149 to 151 in 2b59996

	getSessionId(req.getUri())
	.map(SessionId::new)
	.map(this::isSessionOwner)