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From "Pat Fox (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-3746) Non Durable Topic subscription with prefetch=0, MessageConsumer.receivenowait() (or MessageConsumer.receive(timeout) hangs indefinitely
Date Wed, 29 Feb 2012 13:07:57 GMT
Non Durable Topic subscription with prefetch=0, MessageConsumer.receivenowait() (or MessageConsumer.receive(timeout)
hangs indefinitely
---------------------------------------------------------------------------------------------------------------------------------------

                 Key: AMQ-3746
                 URL: https://issues.apache.org/jira/browse/AMQ-3746
             Project: ActiveMQ
          Issue Type: Bug
          Components: Broker
    Affects Versions: 5.5.1
            Reporter: Pat Fox


Non Durable Topic subscription with prefetch=0, MessageConsumer.receivenowait() (or MessageConsumer.receive(timeout)
hangs indefinitely.

I get the following thread dump

{code}
"main" prio=5 tid=7f996d000000 nid=0x105bc3000 in Object.wait() [105bc1000]
   java.lang.Thread.State: WAITING (on object monitor)
	at java.lang.Object.wait(Native Method)
	- waiting on <7f39f1b30> (a java.lang.Object)
	at java.lang.Object.wait(Object.java:485)
	at org.apache.activemq.SimplePriorityMessageDispatchChannel.dequeue(SimplePriorityMessageDispatchChannel.java:87)
	- locked <7f39f1b30> (a java.lang.Object)
	at org.apache.activemq.ActiveMQMessageConsumer.dequeue(ActiveMQMessageConsumer.java:468)
	at org.apache.activemq.ActiveMQMessageConsumer.receiveNoWait(ActiveMQMessageConsumer.java:621)
	at org.apache.activemq.usecases.TopicSubscriptionZeroPrefetchTest.testTopicConsumerPrefetchZero(TopicSubscriptionZeroPrefetchTest.java:71)
{code}

It seems the TopicSubscription does not support "pullMessage".

This only appears to impact Non Durable Topic Subscriptions. Durable Topic Subscriptions with
prefetch=0 do exhibit this behavior.




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