CLONE - Default value of id-cache-size attribute is potencially dangerous when very small messages are used ----------------------------------------------------------------------------------------------------------- Key: AS7-4859 URL: https://issues.jboss.org/browse/AS7-4859 Project: Application Server 7 Issue Type: Bug Components: JMS Affects Versions: 7.1.2.Final (EAP) Reporter: Miroslav Novak Assignee: Clebert Suconic Fix For: 7.1.3.Final (EAP) Hi, I hit an issue with HornetQ core bridges. I tried test scenario with 4 nodes where: 1) there are two clusters A and B (each contains two nodes) 2) there is hornetq core bridge configured from cluster A to cluster B (A1 -> B1, A2 -> B2) During sending messages (30KB ByteMessages) to A1 and reading them from B2, node A2 was killed and started a few times. In the end there were duplicated messages. Problem was in low value of id-cache-size attribute which is 2000 by default and confirmation-window-size which is for bridges (1024 * 1024) bytes. Can be default value of id-cache-size increased so we can avoid this situation? This is potentially dangerous and hard for admins to realize before the problem occurs.