serviceability/attach/RemovingUnixDomainSocketTest.java failed

The following test failed in the JDK16 CI:

serviceability/attach/RemovingUnixDomainSocketTest.java

Here's a snippet from the log file:

----------System.out:(32/2659)----------
Command line: ['/opt/mach5/mesos/work_dir/jib-master/install/jdk-16+3-55/linux-x64-debug.jdk/jdk-16/fastdebug/bin/java' '-XX:MaxRAMPercentage=6' '-XX:NativeMemoryTracking=detail' '-cp' '/opt/mach5/mesos/work_dir/slaves/4728e7c1-7e67-490e-be0f-6bbf2a2f33db-S273/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/4d1e47c5-02f5-451b-9881-260887e6d0f3/runs/7eef243f-83c7-4e19-a4c9-431d6cc7da56/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_serviceability/classes/0/serviceability/attach/RemovingUnixDomainSocketTest.d:/opt/mach5/mesos/work_dir/slaves/4728e7c1-7e67-490e-be0f-6bbf2a2f33db-S273/frameworks/1735e8a2-a1db-478c-8104-60c8b0af87dd-0196/executors/4d1e47c5-02f5-451b-9881-260887e6d0f3/runs/7eef243f-83c7-4e19-a4c9-431d6cc7da56/testoutput/test-support/jtreg_open_test_hotspot_jtreg_hotspot_serviceability/classes/0/test/lib' 'jdk.test.lib.apps.LingeredApp' 'ae912189-e6d0-4324-9e35-5d0ee36d19ab.lck']
[jcmd]:/opt/mach5/mesos/work_dir/jib-master/install/jdk-16+3-55/linux-x64-debug.jdk/jdk-16/fastdebug/bin/jcmd -J-XX:MaxRAMPercentage=6 -J-XX:NativeMemoryTracking=detail 7890 VM.version
[2020-06-23T05:38:27.493747386Z] Gathering output for process 7924
[jcmd] 7890:
[2020-06-23T05:38:28.885343285Z] Waiting for completion for process 7924
[2020-06-23T05:38:28.885633392Z] Waiting for completion finished for process 7924
jcmd stdout: [Java HotSpot(TM) 64-Bit Server VM version 16-ea+3-55
JDK 16.0.0
];
jcmd stderr: []
jcmd exitValue = 0
[2020-06-23T05:38:28.930226202Z] Waiting for completion for process 7924
[2020-06-23T05:38:28.930377247Z] Waiting for completion finished for process 7924
Remove /tmp/.java_pid7890
[jcmd]:/opt/mach5/mesos/work_dir/jib-master/install/jdk-16+3-55/linux-x64-debug.jdk/jdk-16/fastdebug/bin/jcmd -J-XX:MaxRAMPercentage=6 -J-XX:NativeMemoryTracking=detail 7890 VM.version
[2020-06-23T05:38:28.969936254Z] Gathering output for process 7973
[jcmd] 7890:
[jcmd] Java HotSpot(TM) 64-Bit Server VM version 16-ea+3-55
[jcmd] JDK 16.0.0
[2020-06-23T05:38:29.844964734Z] Waiting for completion for process 7973
[2020-06-23T05:38:29.845645978Z] Waiting for completion finished for process 7973
jcmd stdout: [];
jcmd stderr: [Native Memory Tracking did not setup properly, using wrong launcher?
]
jcmd exitValue = 0
[2020-06-23T05:38:29.845854340Z] Waiting for completion for process 7973
[2020-06-23T05:38:29.845977432Z] Waiting for completion finished for process 7973
[2020-06-23T05:38:29.850685290Z] Waiting for completion for process 7973
[2020-06-23T05:38:29.850868204Z] Waiting for completion finished for process 7973
 LingeredApp stdout: [];
 LingeredApp stderr: []
 LingeredApp exitValue = 0
----------System.err:(20/1147)----------
[jcmd] Java HotSpot(TM) 64-Bit Server VM warning: Native Memory Tracking did not setup properly, using wrong launcher?
 stdout: [];
 stderr: [Native Memory Tracking did not setup properly, using wrong launcher?
]
 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:64)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:564)
at com.sun.javatest.regtest.agent.MainActionHelper$AgentVMRunnable.run(MainActionHelper.java:298)
at java.base/java.lang.Thread.run(Thread.java:832)

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

result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: stderr was not empty


test result: Failed. Execution failed: `main' threw exception: java.lang.RuntimeException: stderr was not empty


It's not clear if the failure is due to "Native Memory Tracking
did not setup properly, using wrong launcher?" or if it is
due to "RuntimeException: stderr was not empty".