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From Timothy Bish <tabish...@gmail.com>
Subject Re: Activemq-cpp and Message Groups malfunction
Date Tue, 01 Dec 2009 14:12:45 GMT
On Tue, 2009-12-01 at 05:57 -0800, kalki70 wrote:
> 
> 
> kalki70 wrote:
> > 
> > Hello,
> > 
> > We are having a problem when using Activemq-cpp (version 2.2.6). This
> > problem happens with Stomp and Openwire.
> > We create thousands of message groups dynamically : Create a message
> > group, send several messages, close message group. The producer is a C++
> > application, the consumer is two instances of JBoss in two different
> > machines. This "in general" works, but from time to time, in a random way,
> > the message group that is assigned to one instance of JBoss is switched to
> > the other instance, as if the previous one had failed.
> > Example :
> > * We send a message with some JMSXGroupId, it is sent to JBoss1
> > * We send several more messages, they are received by JBoss1, as expected.
> > * We keep sending messages, but now they are received by JBoss2!!??
> > 
> > JBoss1 is all the time up and running. The garbage collector didn't work
> > during the test. This problem happens even with very low load, in a
> > randomly way. Just sometimes. When we put a very high load, so the
> > response time from JBoss increases, we start seeing many more of this
> > "unexpected switching".
> > We checked the messages sent, to check the JMSXGroupId and JMSXGroupSeq
> > (we even used a network sniffer to check them) and their values are right. 
> > 
> > It looks as if ActiveMQ considers JBoss1 dead, so it switches the message
> > groups to JBoss2. What is the criteria used by ActiveMQ to consider a
> > consumer "dead" ? Is there some configuration parameter to increase any
> > timeout waiting for acknowledge messages from consumers?
> > 
> > The strangest part is that if we use a Java application as the producer,
> > it works perfect. There are never "unexpected switching". We compared the
> > message properties sent in Java and C++ and they are the same. 
> > 
> > We are so far completely lost at this. 
> > 
> > Any idea?
> > 
> > Thanks,
> > 
> > Luis
> > 
> 
> No one has any idea about this problem? We are really stuck with it. May
> someone recommend some other broker that has a similar functionality, but
> actually works in C++ ???
> 
> Luis
> 

Have you tried newer versions of the Broker and C++ client?

Regards
Tim.


-- 
Tim Bish
http://fusesource.com
http://timbish.blogspot.com/




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