I don't think it was the encoding issue. I now suspect it encounters trouble
in a low-memory situation. I have a test case I run on my PC that POSTs a
number of messages and then GETs them back off of the queue. If I keep the
number of messages under 650, I can run it over and over again without
problems. When I attempt more, it may work, but most times I encounter
trouble. When using 5.4.3, it reports:
2012-06-27 07:33:02,544 | DEBUG | Async client internal exception occurred
with no exception listener registered: java.lang.IllegalStateException:
DISPATCHED,initial | org.apache.activemq.ActiveMQConnection | ActiveMQ
Session: ID:d22275-4106-1340794703957-2:37:1
java.lang.IllegalStateException: DISPATCHED,initial
at
org.eclipse.jetty.server.AsyncContinuation.dispatch(AsyncContinuation.java:364)
at
org.eclipse.jetty.server.AsyncContinuation.resume(AsyncContinuation.java:769)
at
org.apache.activemq.web.MessageServlet$Listener.onMessageAvailable(MessageServlet.java:368)
at
org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1250)
at
org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:134)
at
org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:205)
at
org.apache.activemq.thread.DedicatedTaskRunner.runTask(DedicatedTaskRunner.java:98)
at
org.apache.activemq.thread.DedicatedTaskRunner$1.run(DedicatedTaskRunner.java:36)
Shortly before the trouble, I start seeing some messages like this:
2012-06-27 07:33:01,435 | DEBUG | Main:memory:queue://myqueue:memory: usage
change from: 67% of available memory, to: 68% of available memory |
org.apache.activemq.usage.Usage | VMTransport: vm://localhost#71
When using 5.6.0, the exception call stack is:
2012-06-27 07:44:04,007 | DEBUG | Async client internal exception occurred
with no exception listener registered: java.lang.IllegalStateException:
REDISPATCHING,initial,resumed | org.apache.activemq.ActiveMQConnection |
ActiveMQ Session Task-2
java.lang.IllegalStateException: REDISPATCHING,initial,resumed
at
org.eclipse.jetty.server.AsyncContinuation.dispatch(AsyncContinuation.java:403)
at
org.eclipse.jetty.server.AsyncContinuation.resume(AsyncContinuation.java:810)
at
org.apache.activemq.web.MessageServlet$Listener.onMessageAvailable(MessageServlet.java:368)
at
org.apache.activemq.ActiveMQMessageConsumer.dispatch(ActiveMQMessageConsumer.java:1320)
at
org.apache.activemq.ActiveMQSessionExecutor.dispatch(ActiveMQSessionExecutor.java:131)
at
org.apache.activemq.ActiveMQSessionExecutor.iterate(ActiveMQSessionExecutor.java:202)
at
org.apache.activemq.thread.PooledTaskRunner.runTask(PooledTaskRunner.java:122)
at
org.apache.activemq.thread.PooledTaskRunner$1.run(PooledTaskRunner.java:43)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:619)
-----
Stephen Vincent
--
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