The following two tests timed out in the JDK17 CI w/ ZGC:

vmTestbase/gc/gctests/StringInternSyncWithGC2/TestDescription.java
vmTestbase/gc/gctests/StringIntern/StringIntern.java

Here's snippets from the StringInternSyncWithGC2 test log:

#section:compile
----------messages:(8/388)*----------
command: compile C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-17+23-2075\\src.full\\open\\test\\hotspot\\jtreg\\vmTestbase\\gc\\gctests\\StringInternSyncWithGC\\StringInternSyncWithGC.java
reason: .class file out of date or does not exist
Mode: agentvm
Agent id: 4
Timeout refired 480 times
Timeout information:
--- Timeout information end.
elapsed time (seconds): 3332.359
----------configuration:(11/941)*----------
Boot Layer (javac runtime environment)
  class path: C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\5.1\\b01\\bundles\\jtreg_bin-5.1.zip\\jtreg\\lib\\javatest.jar
              C:\\ade\\mesos\\work_dir\\jib-master\\install\\jtreg\\5.1\\b01\\bundles\\jtreg_bin-5.1.zip\\jtreg\\lib\\jtreg.jar
  patch: java.base T:\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_gc_misc\\patches\\java.base

javac compilation environment
  source path: C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-17+23-2075\\src.full\\open\\test\\hotspot\\jtreg\\vmTestbase
               C:\\ade\\mesos\\work_dir\\jib-master\\install\\jdk-17+23-2075\\src.full\\open\\test\\lib
  class path: T:\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_gc_misc\\classes\\2\\vmTestbase
               T:\\testoutput\\test-support\\jtreg_open_test_hotspot_jtreg_vmTestbase_vm_gc_misc\\classes\\2\\test\\lib

----------rerun:(41/5920)*----------

Please note that this test timed out in the *compile* phase.


Here's a snippet from the StringIntern test's log:

#section:main
----------messages:(6/261)----------
command: main gc.gctests.StringIntern.StringIntern
reason: User specified action: run main/othervm gc.gctests.StringIntern.StringIntern
Mode: othervm [/othervm specified]
Timeout information:
--- Timeout information end.
elapsed time (seconds): 3804.369
----------configuration:(0/0)----------
----------System.out:(39/2841)----------
Timeout refired 480 times
Stress time: 120 seconds
Stress iterations factor: 1
Stress threads factor: 1
Stress runs factor: 1
Max memory: 2136997888
Sleep time: 500
Iterations: 0
Number of threads: 24
Run GC thread: false
Run mem diag thread: false
Run forever: false
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@39bb71dd,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@3116a6b3,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@53411cd5,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@14f15a56,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@70fbfbe2,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@74dce870,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@2fa0f58a,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@319d29c2,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@1e16f0f8,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@d1a0422,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@25bebcae,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@7d3552e2,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@540dfc8c,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@96bc93b,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@59e04f74,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@e95a4e8,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@35c7c02a,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@6232f5b8,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@39f29d65,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@1a63dc57,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@11ae99a1,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@64442119,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@49709141,5,MainThreadGroup]
Starting Thread[gc.gctests.StringIntern.StringIntern$StringGenerator@4d756d5c,5,MainThreadGroup]
For random generator using seed: 5747435418235436495
To re-run test with same seed value please add "-Djdk.test.lib.random.seed=5747435418235436495" to command line.
No unexpected exceptions/errors are thrown
----------System.err:(1/16)----------
STATUS:Passed.
----------rerun:(40/6324)*----------

<snip>

result: Error. Program `c:\ade\mesos\work_dir\jib-master\install\jdk-17+23-2075\windows-x64.jdk\jdk-17\bin\java' timed out (timeout set to 480000ms, elapsed time including timeout handling was 3372493ms).


Please note that this test passed after the timeout handler
started running.

The really strange part of this failure is that the timeout handler
kicked in at 480 seconds which makes sense since the default
timeout value is 120 seconds and the default timeoutFactor
value is 4 so the total timeout is 480 seconds/8 minutes.

However, the elapsed time for the test is 3804.369 seconds
which is 63 minutes. What the heck happened that caused
the test to take another 55 minutes after the 8 minute timeout.