The following test timed out in the JDK18 CI:

java/net/Socket/CloseAvailable.java

Here's a snippet from the log file:

#section:main
----------messages:(8/220)----------
command: main CloseAvailable
reason: User specified action: run main CloseAvailable
Mode: agentvm
Agent id: 24
Timeout refired 480 times
Timeout information:
--- Timeout information end.
elapsed time (seconds): 494.508
----------configuration:(16/2106)----------

<snip>

result: Error. Agent error: java.lang.Exception: Agent 24 timed out with a timeout of 480 seconds; check console log for any additional details