tools/jar/JarEntryTime.java fails intermittently on checking extracted file last modified values are the current times

jdk9, b06 pit, solaris x64, fastdebug

Quoting jtr file:

----------System.out:(5/264)----------
Extracted to 2014-03-22T06:01:17Z, expected to be close to 2014-03-22T06:01:06Z
Extracted to 2014-03-22T06:01:17Z, expected to be close to 2014-03-22T06:01:06Z
Extracted to 2014-03-22T06:01:17Z, expected to be close to 2014-03-22T06:01:06Z

Passed = 22 failed = 3
----------System.err:(49/2751)----------
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1328)
at JarEntryTime.fail(JarEntryTime.java:161)
at JarEntryTime.checkFileTime(JarEntryTime.java:154)
at JarEntryTime.realMain(JarEntryTime.java:140)
at JarEntryTime.main(JarEntryTime.java:169)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:484)
at com.sun.javatest.regtest.MainWrapper$MainThread.run(MainWrapper.java:94)
at java.lang.Thread.run(Thread.java:744)