The messages are persisted in the database (Oracle). In the oracle-persistence-service.xml I've turned the UsingBatchUpdates to false. <attribute name="UsingBatchUpdates">false</attribute> There are no warnings or errors on the server. All the 5 publishers are different instance of the same class and they run simultaneously and publish 1000 messages each. Except for 1 publisher, all other messages (4000) are persisted to database and is consumed by the subscriber. This happens only during the first run of a fresh setup (AS, JBM, DB, Subscriber, Publisher all are running for the first time). In all the subsequent runs no messages are lost. Publisher Code: | String destinationName = "/topic/testTopic"; | InitialContext ic = new InitialContext(); | TopicConnectionFactory cf = (TopicConnectionFactory)ic.lookup("/ClusteredConnectionFactory"); | Topic topic = (Topic)ic.lookup(destinationName); | TopicConnection connection = cf.createTopicConnection(); | TopicSession session = connection.createTopicSession(false, TopicSession.AUTO_ACKNOWLEDGE); | TopicPublisher publisher = session.createPublisher(topic); | connection.start(); | String msgStr = "Hello World"; | TextMessage tm = session.createTextMessage(msgStr); | publisher.setTimeToLive(604800000); | publisher.publish(tm); | Subscriber Code: | String destinationName = "/topic/testTopic"; | InitialContext ic = new InitialContext(); | TopicConnectionFactory cf = (TopicConnectionFactory)ic.lookup("/ClusteredConnectionFactory"); | Topic topic = (Topic)ic.lookup(destinationName); | TopicConnection connection = cf.createTopicConnection("admin", "admin"); | connection.setClientID("MyClientID"); | TopicSession session = connection.createTopicSession(false, TopicSession.AUTO_ACKNOWLEDGE); | session.createDurableSubscriber(topic, "Alpha"); | TopicSubscriber subscriber = session.createDurableSubscriber(topic, "Alpha"); | connection.start(); | In my actual code I've done all the exception handling. View the original post : http://www.jboss.com/index.html?module=bb&op=viewtopic&p=4165140#... Reply to the post : http://www.jboss.com/index.html?module=bb&op=posting&mode=reply&a...