I have a problem where I produce a TextMessage to a topic and the consumer receives it twice. I only have one system where I can reproduce this and I would appreciate any tips on how to debug this further.
I have four JVMs, let's call them A, B, C and D. Each one runs an ActiveMQ broker. The connection topology looks like this: A -> B C -> B D -> B I.e. B is the only one with broker that runs transport connectors. Let's say that I have topic T, where C and D have subscribers with AUTO_ACKNOWLEDGE. - If A sends a text message to T, then C receives it twice - If D is not connected then C receives it only once. I put some debug logs in C and so far I have learned the following about the two instances received: 1) The messages arrive about 200 ms apart. 2) Both messages have the same id as returned by javax.jms.Message#getJMSMessageID 3) Both have the same connection as reported by org.apache.activemq.command.Message#getConnection 4) Both have redelivered as false as reported by org.apache.activemq.command.ActiveMQMessage#getJMSRedelivered 5) Both have redeliver counter = 0 as reported by org.apache.activemq.command.Message#getRedeliveryCounter 6) The messages have different broker intime, as reported by org.apache.activemq.command.Message#getBrokerInTime - The first has 1500305481165 and the second has 1500305481166. I have tried to reproduce this elsewhere without any success and I am near the end of my wits. Thanks for any debugging tips. Tomas -- View this message in context: http://activemq.2283324.n4.nabble.com/Duplicate-messages-received-with-ActiveMQ-5-13-2-tp4728627.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.
