The following test timed out in the JDK20 CI:

com/sun/net/httpserver/simpleserver/StressDirListings.java

Here's a snippet from the log file:

#section:testng
----------messages:(9/373)----------
command: testng StressDirListings
reason: User specified action: run testng/othervm StressDirListings
started: Wed Nov 09 23:22:01 UTC 2022
Mode: othervm [/othervm specified]
Additional options from @modules: --add-modules jdk.httpserver,java.logging
Timeout information:
--- Timeout information end.
finished: Wed Nov 09 23:30:15 UTC 2022
elapsed time (seconds): 494.009
----------configuration:(3/55)----------
Boot Layer
  add modules: jdk.httpserver java.logging

----------System.out:(1602/85389)----------

<snip>

127.0.0.1 - - [09/Nov/2022:23:30:09 +0000] "GET / HTTP/1.1" 200 -
Resource requested: /opt/mach5/mesos/work_dir/slaves/0c72054a-24ab-4dbb-944f-97f9341a1b96-S137578/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/ff2de1b0-21e3-40f0-b50f-3b8816b3dd0d/runs/3bf9fcc1-4211-4165-976d-d54fc1b41117/testoutput/test-support/jtreg_open_test_jdk_tier2_part3/scratch/2
> Connection: Upgrade, HTTP2-Settings
> Http2-settings: AAEAAEAAAAIAAAABAAMAAABkAAQBAAAAAAUAAEAA
> Host: localhost:46749
> Upgrade: h2c
> User-agent: Java-http-client/20-ea
>
< Date: Wed, 09 Nov 2022 23:30:09 GMT
< Last-modified: Wed, 9 Nov 2022 23:30:04 GMT
< Content-type: text/html; charset=UTF-8
< Content-length: 309
<
test StressDirListings.testDirListings(): success
config StressDirListings.teardown(): success

===============================================
com/sun/net/httpserver/simpleserver/StressDirListings.java
Total tests run: 1, Passes: 1, Failures: 0, Skips: 0
===============================================

----------System.err:(1/15)----------
STATUS:Passed.
----------rerun:(37/7091)*----------

The test PASSed while the timeout handler was running.
With a name like StressDirListings.java, perhaps it needs
a slightly longer default timeout value than 120 seconds/
2 minutes? With the default timeoutFactor of 4, that gives
us a total timeout value of 480 seconds/8 minutes and
the test timed out in:

elapsed time (seconds): 494.009