The following test timed out in the JDK20 CI:

vmTestbase/metaspace/shrink_grow/ShrinkGrowMultiJVM/ShrinkGrowMultiJVM.java

Here's a snippet from the log file:

#section:driver
----------messages:(8/320)----------
command: driver metaspace.shrink_grow.ShrinkGrowMultiJVM.ShrinkGrowMultiJVM
reason: User specified action: run driver metaspace.shrink_grow.ShrinkGrowMultiJVM.ShrinkGrowMultiJVM
Mode: agentvm
Agent id: 7
Timeout refired 480 times
Timeout information:
--- Timeout information end.
elapsed time (seconds): 985.07
----------configuration:(18/1972)*----------

<snip>

----------System.out:(15/1074)*----------
%arg #0: c:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-20+12-692\\windows-x64-debug.jdk\\jdk-20\\fastdebug\\bin\\java
%arg #1: -Xlog:gc:gc_$i.log
%arg #2: -XX:MetaspaceSize=10m
%arg #3: -XX:MaxMetaspaceSize=20m
%arg #4: -cp
%arg #5: C:\\sb\\prod\\1661000537\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_metaspace\\classes\\5\\vmTestbase\\metaspace\\shrink_grow\\ShrinkGrowMultiJVM\\ShrinkGrowMultiJVM.d;C:\\sb\\prod\\1661000537\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_metaspace\\classes\\5\\vmTestbase;C:\\sb\\prod\\1661000537\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_metaspace\\classes\\5\\test\\lib
%arg #6: -XX:MaxRAMPercentage=4.16667
%arg #7: -Djava.io.tmpdir=c:\\sb\\prod\\1661000537\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_metaspace\\tmp
%arg #8: -XX:+CreateCoredumpOnCrash
%arg #9: -XX:+UseZGC
%arg #10: metaspace.shrink_grow.ShrinkGrowTest.ShrinkGrowTest
%arg #11: jvm#$i
=== process #0 started
=== process #1 started
=== proces
result: Error. Agent error: java.lang.Exception: Agent 7 timed out with a timeout of 480 seconds; check console log for any additional details