The following test failed in the JDK16 CI:

serviceability/attach/RemovingUnixDomainSocketTest.java

Here's a snippet from the log file:

Command line: ['/opt/mach5/mesos/work_dir/jib-master/install/jdk-17+1-9/linux-x64-debug.jdk/jdk-17/fastdebug/bin/java' '-XX:MaxRAMPercentage=6' '-Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S15022/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2d436720-52b7-4e30-88b3-ac04c49e361b/runs/e75e8ed6-c064-4f52-915f-31561738c7d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/tmp' '-XX:+UseBiasedLocking' '-cp' '/opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S15022/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2d436720-52b7-4e30-88b3-ac04c49e361b/runs/e75e8ed6-c064-4f52-915f-31561738c7d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/classes/1/serviceability/attach/RemovingUnixDomainSocketTest.d:/opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S15022/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2d436720-52b7-4e30-88b3-ac04c49e361b/runs/e75e8ed6-c064-4f52-915f-31561738c7d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/classes/1/test/lib' 'jdk.test.lib.apps.LingeredApp' '36570e76-43ad-42b5-87ef-d99c7d700ce2.lck']
[jcmd]:/opt/mach5/mesos/work_dir/jib-master/install/jdk-17+1-9/linux-x64-debug.jdk/jdk-17/fastdebug/bin/jcmd -J-XX:MaxRAMPercentage=6 -J-Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S15022/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2d436720-52b7-4e30-88b3-ac04c49e361b/runs/e75e8ed6-c064-4f52-915f-31561738c7d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/tmp -J-XX:+UseBiasedLocking 30828 VM.version
[2020-12-11T03:48:22.112629869Z] Gathering output for process 30885
[jcmd] 30828:
[jcmd] Java HotSpot(TM) 64-Bit Server VM version 17-ea+1-LTS-9
[jcmd] JDK 17.0.0
[2020-12-11T03:48:23.555312891Z] Waiting for completion for process 30885
[2020-12-11T03:48:23.555599611Z] Waiting for completion finished for process 30885
jcmd stdout: [];
jcmd stderr: []
jcmd exitValue = 0
[2020-12-11T03:48:23.616345878Z] Waiting for completion for process 30885
[2020-12-11T03:48:23.616514194Z] Waiting for completion finished for process 30885
Remove /opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S15022/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2d436720-52b7-4e30-88b3-ac04c49e361b/runs/e75e8ed6-c064-4f52-915f-31561738c7d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/tmp/.java_pid30828
[jcmd]:/opt/mach5/mesos/work_dir/jib-master/install/jdk-17+1-9/linux-x64-debug.jdk/jdk-17/fastdebug/bin/jcmd -J-XX:MaxRAMPercentage=6 -J-Djava.io.tmpdir=/opt/mach5/mesos/work_dir/slaves/983c483a-6907-44e0-ad29-98c7183575e2-S15022/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/2d436720-52b7-4e30-88b3-ac04c49e361b/runs/e75e8ed6-c064-4f52-915f-31561738c7d4/testoutput/test-support/jtreg_open_test_hotspot_jtreg_tier1_serviceability/tmp -J-XX:+UseBiasedLocking 30828 VM.version
[2020-12-11T03:48:23.638297718Z] Gathering output for process 30937
[jcmd] 30828:
[2020-12-11T03:48:24.605480781Z] Waiting for completion for process 30937
[2020-12-11T03:48:24.605681628Z] Waiting for completion finished for process 30937
jcmd stdout: [Java HotSpot(TM) 64-Bit Server VM version 17-ea+1-LTS-9
JDK 17.0.0
];
jcmd stderr: [Option UseBiasedLocking was deprecated in version 15.0 and will likely be removed in a future release.
]
jcmd exitValue = 0
[2020-12-11T03:48:24.605824988Z] Waiting for completion for process 30937
[2020-12-11T03:48:24.605954803Z] Waiting for completion finished for process 30937
[2020-12-11T03:48:24.613340465Z] Waiting for completion for process 30937
[2020-12-11T03:48:24.613517619Z] Waiting for completion finished for process 30937
 LingeredApp stdout: [];
 LingeredApp stderr: [Java HotSpot(TM) 64-Bit Server VM warning: Option UseBiasedLocking was deprecated in version 15.0 and will likely be removed in a future release.
]
 LingeredApp exitValue = 0
----------System.err:(22/1282)----------
[jcmd] Java HotSpot(TM) 64-Bit Server VM warning: Option UseBiasedLocking was deprecated in version 15.0 and will likely be removed in a future release.
 stdout: [Java HotSpot(TM) 64-Bit Server VM version 17-ea+1-LTS-9
JDK 17.0.0
];
 stderr: [Option UseBiasedLocking was deprecated in version 15.0 and will likely be removed in a future release.
]
 exitValue = 0

java.lang.RuntimeException: stderr was not empty
at jdk.test.lib.process.OutputAnalyzer.stderrShouldBeEmptyIgnoreVMWarnings(OutputAnalyzer.java:145)
at RemovingUnixDomainSocketTest.runJCmd(RemovingUnixDomainSocketTest.java:69)
at RemovingUnixDomainSocketTest.main(RemovingUnixDomainSocketTest.java:88)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:78)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:567)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:831)

JavaTest Message: Test threw exception: java.lang.RuntimeException
JavaTest Message: shutting down test