Test iterates over result of FileSystems.getDefault().getFileStores(), and has an assertion that the current store is different from the previous one in the list. That assertion failed:

[Note: Actual hostname redacted to "<testhostname>" to avoid exposing confidential internal hostname.]

/tmp/common1 (<testhostname>:/export/local) (name=<testhostname>:/export/local type=nfs)
/tmp/common1 (<testhostname>:/export/local) (name=<testhostname>:/export/local type=nfs)
----------System.err:(14/758)----------
java.lang.RuntimeException: Assertion failed
at Basic.assertTrue(Basic.java:57)
at Basic.doTests(Basic.java:142)
at Basic.main(Basic.java:49)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
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:830)