hazelcast/hazelcast — pull request #1917 by sancar (2014-03-04 15:25:20+00:00)
Title: fix NPE exception. Converted to Transaction exception.

Problem found in testTxnRollback see
https://github.com/hazelcast/hazelcast/blob/master/hazelcast-client/src/test/java/com/hazelcast/client/txn/ClientTxnTest.java#L66