I am seeing com/sun/nio/sctp/SctpChannel/CloseDescriptors.java failing like below. It reliably reproduces on my machine.

$ CONF=linux-x86_64-server-fastdebug make run-test TEST=com/sun/nio/sctp/SctpChannel/CloseDescriptors.java
...

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end
lsof: WARNING: can't stat() fuse.gvfsd-fuse file system /run/user/1000/gvfs
      Output information may be incomplete.
lsof: WARNING: can't stat() fuse file system /run/user/1000/doc
      Output information may be incomplete.
COMMAND PID USER FD TYPE DEVICE SIZE/OFF NODE NAME
java 1941570 buildbot 6u unix 0x0000000000000000 0t0 153539367 type=STREAM
STDERR:
java.lang.RuntimeException: Failed: detected unclosed FD.
at CloseDescriptors.main(CloseDescriptors.java:92)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:77)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at com.sun.javatest.regtest.agent.MainWrapper$MainThread.run(MainWrapper.java:127)
at java.base/java.lang.Thread.run(Thread.java:833)