jtreg could fails unexpectedly while scanning directory:
here is log :
Passed: java/lang/management/ThreadMXBean/ThreadStateTest.java
Passed: java/lang/management/ThreadMXBean/ThreadUserTime.java
Test results: passed: 65
Error: Unexpected exception occurred! java.lang.NullPointerException
java.lang.NullPointerException
at com.sun.javatest.finder.TagTestFinder.scanDirectory(TagTestFinder.java:190)
at com.sun.javatest.finder.TagTestFinder.scan(TagTestFinder.java:96)
at com.sun.javatest.TestFinder.read(TestFinder.java:439)
at com.sun.javatest.TRT_TreeNode.processFile(TRT_TreeNode.java:1082)
at com.sun.javatest.TRT_TreeNode.scanIfNeeded(TRT_TreeNode.java:647)
at com.sun.javatest.TRT_TreeNode.getChildCount(TRT_TreeNode.java:124)
at com.sun.javatest.TRT_Iterator$PseudoFrame.nextIndex(TRT_Iterator.java:904)
at com.sun.javatest.TRT_Iterator.findNext(TRT_Iterator.java:599)
at com.sun.javatest.TRT_Iterator.nextElement(TRT_Iterator.java:179)
at com.sun.javatest.TRT_Iterator.next(TRT_Iterator.java:200)
at com.sun.javatest.report.ResultSection.<init>(ResultSection.java:125)
at com.sun.javatest.report.HTMLReport.write(HTMLReport.java:71)
at com.sun.javatest.report.Report.writeReportHTML(Report.java:710)
at com.sun.javatest.report.Report.writeReports(Report.java:138)
at com.sun.javatest.report.Report.writeReport(Report.java:127)
at com.sun.javatest.regtest.RegressionReporter.report(RegressionReporter.java:96)
at com.sun.javatest.regtest.Main.batchHarness(Main.java:1956)
at com.sun.javatest.regtest.Main.run(Main.java:1114)
at com.sun.javatest.regtest.Main.run(Main.java:954)
at com.sun.javatest.regtest.Main.main(Main.java:894)

real 7m45.220s
user 15m1.436s
sys 0m43.007s
INFO Harness failed with exit code 5
DEBUG Run.sh failed with exit code 5