Hi there,
I am wondering how many consumers there are on the topic and if there
are any slow consumers that
can't keep up with the messaging load. Without having verified it, it
seems that your app hangs in the
the send message waiting for the response from the broker. That would
happen, if the sending application
can't place the message in the broker.
One thing strikes me odd....if all of your consumers keep consuming,
that shouldn't happen. So it might
be a starting point to double check them.
As for the Advisory messages: Yes, thats normal. For more details on
advisories see
http://activemq.apache.org/advisory-message.html. You *could turn
advisories off,
but you need to remember to reenable them if you are switching to a
network of brokers
some day ;)
Hope that helps a bit
Andreas
On Sep 2, 2009, at 7:24 AM, wo wrote:
Hi.
We're having a problem under moderate to heavy load (~2500
nonpersisted
messages /second on a single broker) while producers will just hang
indefinitely at some point and producer application needs to be
restarted in
order to continue.
Here's a snippet from a producer application thread dump after hang:
at
java.util.concurrent.ArrayBlockingQueue.take(ArrayBlockingQueue.java:
317)
at
org
.apache
.activemq.transport.FutureResponse.getResult(FutureResponse.java:40)
at
org
.apache
.activemq
.transport.ResponseCorrelator.request(ResponseCorrelator.java:80)
at
org
.apache
.activemq.ActiveMQConnection.syncSendPacket(ActiveMQConnection.java:
1195)
at
org.apache.activemq.ActiveMQSession.send(ActiveMQSession.java:1644)
- locked <0x00002aaab5abeb30> (a java.lang.Object)
at
org
.apache
.activemq.ActiveMQMessageProducer.send(ActiveMQMessageProducer.java:
227)
at
org
.apache
.activemq
.ActiveMQMessageProducerSupport
.send(ActiveMQMessageProducerSupport.java:241)
at
org.springframework.jms.core.JmsTemplate.doSend(JmsTemplate.java:597)
So far we've tried upgrading AMQ from 5.1 to 5.2 and increasing the
memory
limits in broker config, both giving no result, the problem still
exists.
Neither application nor activemq log displays any errors / exceptions.
One thing i have noticed is that for every message sent to a topic,
there
are 2 advisory messages being produced in
ActiveMQ.Advisory.Producer.Topic.TOPICNAME which strikes me as odd
but i
haven't been able to find any information in forums or manual about
whether
this is normal behaviour?
Producer side is a standalone Spring application with AMQ
connectionfactory
wrapped in spring SingleConnectionFactory and used in jmstemplate,
as per
example.
Any insight would be greatly appreciated.
Tanel Unt
Core Developer
Tracking Center Ltd.
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