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Date: Thu, 8 May 2008 21:18:30 -0700 (PDT)
From: jaya_srini <jya_srini@Hotmail.com>
To: users@activemq.apache.org
Subject: Need Help with blocking Producer!
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hi 

We are using ActiveMQ 5.0 release and observing the following on production.
After a certain number of messages are sent the Activemq send blocks. The
thread dump produced the following

daemon prio=6 tid=0x3793f400 nid=0x1f28 waiting for monitor entry
[0x38aff000..0x38affc98]
   java.lang.Thread.State: BLOCKED (on object monitor)
	at org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1587)
	- waiting to lock <0x07c45ea0> (a java.lang.Object)
	at
org.apache.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:226)
	at
org.apache.activemq.ActiveMQMessageProducerSupport.send(ActiveMQMessageProducerSupport.java:268)
	at
org.apache.activemq.ActiveMQTopicPublisher.publish(ActiveMQTopicPublisher.java:146)


The connection URI looks like the following

failover:(tcp://10.11.12.13:61616?wireFormat.maxInactivityDuration=-1)

I am not sure if jms.useAsyncSend=true or jms.dispatchAsync=true will work
with a failover transport.  

Can someone please help me troubleshoot this? Will increasing the memory
limit on the broker help?

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