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junit.framework.AssertionFailedError: timed out waiting for thread to terminate	at JSR166TestCase.threadFail(JSR166TestCase.java:736)	at JSR166TestCase.awaitTermination(JSR166TestCase.java:1341)	at JSR166TestCase.awaitTermination(JSR166TestCase.java:1352)	at StampedLockTest.testWriteAfterReadLock(StampedLockTest.java:449)