[jboss-jira] [JBoss JIRA] Commented: (JBMESSAGING-1889) Duplicate messages are produced during cluster failover when a cluster node is shutdown

Duplicate messages are produced during cluster failover when a cluster node is shutdown --------------------------------------------------------------------------------------- Key: JBMESSAGING-1889 URL: https://issues.jboss.org/browse/JBMESSAGING-1889 Project: JBoss Messaging Issue Type: Bug Components: Messaging Core Affects Versions: 1.4.8.SP1 Environment: JBoss EAP 5.1.1 Reporter: Tom Ross Assignee: Yong Hao Gao Attachments: DistributedQueueExample.java The scenarion describes a set-up consisting of JBoss cluster and a stand alone JBoss instance hosting a MDB. During the test the master node of the JBoss cluster is shutdown using CTRL/C or shutdown.sh script. The following is a description of the events that hava happened that lead to duplicate messages. - Message is delivered to a MDB from node-1 of the cluster to a MDB in a transaction. The transaction prepare has failed because the server peer of node-1 is shutting down. - Message is rolled back and received again in another transaction. This happens at the client side only. Then the transaction is committed on node-2 as the client has failed over to node-2 of the cluster. - Meanwhile the fact that node-1 is shutting down causes server side failover to happen and the message is failed over to node-2. - node-2 redelivers the message to the MDB in a separate transaction and committs. So the message is received twice.