TransactionScopedTest failed

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T E S T S
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Running com.hp.mwtests.ts.jta.cdi.transactionScoped.TransactionScopedTest
Tests run: 2, Failures: 0, Errors: 1, Skipped: 0, Time elapsed: 11.881 sec <<< FAILURE!
testTxAssociationChangeConcurrently(com.hp.mwtests.ts.jta.cdi.transactionScoped.TransactionScopedTest) Time elapsed: 0.394 sec <<< ERROR!
java.lang.Exception: Concurrent testTxAssociationChange failed with exception
at java.util.TreeMap.rotateLeft(TreeMap.java:2060)
at java.util.TreeMap.fixAfterInsertion(TreeMap.java:2127)
at java.util.TreeMap.put(TreeMap.java:574)
at java.util.TreeSet.add(TreeSet.java:255)
at com.hp.mwtests.ts.jta.cdi.transactionScoped.TransactionScopedTest.addTimestamp(TransactionScopedTest.java:88)
at com.hp.mwtests.ts.jta.cdi.transactionScoped.TransactionScopedTest.testTxAssociationChange(TransactionScopedTest.java:104)
at com.hp.mwtests.ts.jta.cdi.transactionScoped.TransactionScopedTest.access$000(TransactionScopedTest.java:54)

Running com.hp.mwtests.ts.jta.cdi.transactional.TransactionalImplTest
Tests run: 26, Failures: 0, Errors: 0, Skipped: 0, Time elapsed: 13.783 sec

Results :

Tests in error:
TransactionScopedTest.testTxAssociationChangeConcurrently:179 Concurrent test...

Tests run: 28, Failures: 0, Errors: 1, Skipped: 0