I have been testing this setup with one of our clusters and I have found an issue where failover breaks one or two of our queues.
I have a setup where I'm running latest snapshot with Zookeeper and setup for replicated leveldb. When I run a activemq stop (using wrapper) my active master shutdown fine and my slave recognizes this and starts process of going active. When I can get back into my web console I see all queues like expected BUT there are usually one queue with 50 messages that are stuck, it has consumers but they are not consumed. When trying to view contents of queue with jmx or web console it just hangs and times-out. If I delete this queue its recreated and everything starts working again. Only log info I see are these: 2013-05-26 07:09:38,850 | WARN | Async error occurred: java.lang.IllegalArgumentException: The subscription does not exist: ID:tn11-27191-1368304518500-1:6:5:1 | org.apache.activemq.broker.TransportConnection.Service | ActiveMQ NIO Worker 38 java.lang.IllegalArgumentException: The subscription does not exist: ID Here is my env: INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:zookeeper.version=3.4.3-1240972, built on 02/06/2012 10:48 GMT INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.version=1.7.0_21 INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.vendor=Oracle Corporation INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.home=/opt/jdk/jre INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.class.path=/opt/activemq/bin/wrapper.jar:/opt/activemq/bin/activemq.jar INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.library.path=/opt/activemq/bin/linux-x86-64/ INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.io.tmpdir=/tmp INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:java.compiler=<NA> INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:os.name=Linux INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:os.arch=amd64 INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:os.version=3.2.0-37-generic INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:user.name=activemq INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:user.home=/home/activemq INFO | jvm 1 | 2013/05/26 07:09:34 | INFO | Client environment:user.dir=/opt/activemq/bin/linux-x86-64 I tried this we the three latest Snapshots they all do the same. (And in an unrelated error When starting latest 5.9-snapshot I get a message that amqp is not recognized.) -- View this message in context: http://activemq.2283324.n4.nabble.com/Activemq-5-9-leveldb-replication-issue-tp4667495.html Sent from the ActiveMQ - User mailing list archive at Nabble.com.