Leon, can you try a recent snapshot[1], I think your issue may be another variant of https://issues.apache.org/activemq/browse/AMQ-2020 which I fixed last week.
[1] http://people.apache.org/repo/m2-snapshot-repository/org/apache/activemq/apache-activemq/5.3-SNAPSHOT/ 2008/12/8 Leon Liu <[EMAIL PROTECTED]>: > Hi , > We find that ActiveMQ will produce a duplicate message under many > comcumers . First We send 400,000 message to broker, then start comsumer > thread to recieve message.If We have more comsumer Threads, more > duplicate messages would appear. We recieve messages from a broker with > 10 threads , duplicate message can easy produced. > > The attachment are test java code and mq config file. > > Following are java version and os version > > 1. Java version > java version "1.6.0_10-beta" > Java(TM) SE Runtime Environment (build 1.6.0_10-beta-b14) > Java HotSpot(TM) Server VM (build 11.0-b11, mixed mode) > > 2. Linux > Linux core6 2.6.9-42.ELsmp #1 SMP Wed Jul 12 23:32:02 EDT 2006 x86_64 > x86_64 x86_64 GNU/Linux > > And CPU is 2 X Quad-Core AMD Opteron(tm) Processor 2354 , total 8 cores > > > Leon Liu > > -- http://blog.garytully.com Open Source SOA http://FUSESource.com
