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This exception has no message.
java.lang.NullPointerException at com.sun.appserv.util.cache.BaseCache.hash(BaseCache.java:165) at com.sun.appserv.util.cache.BaseCache.get(BaseCache.java:286) at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.getResourceList(J2EETransactionManagerImpl.java:661) at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.enlistComponentResources(J2EETransactionManagerImpl.java:476) at com.sun.enterprise.distributedtx.J2EETransactionManagerImpl.enlistComponentResources(J2EETransactionManagerImpl.java:317) at com.sun.enterprise.distributedtx.UserTransactionImpl.begin(UserTransactionImpl.java:102)