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From sparso <sam.pars...@palringo.com>
Subject Re: Memory leak in activemq-cpp (activemq-cpp-library-3.7.1)
Date Tue, 10 Sep 2013 10:00:48 GMT
Thanks for the info, I can confirm it is indeed due to failover and message
audit.

With the following url, the example application remains on 4% CPU and 15 meg
of memory:

"failover:(tcp://localhost:61616)?connection.checkForDuplicates=false"

Without the "checkForDuplicates=false" the cpu and memory usage grows
constantly. I eventually stopped it at 100% CPU and 340 meg of memory. 

Valgrind suggested that the leak was in ConnectionAudit.cpp:100. I added the
following debug:

                try {
                    audit = this->impl->destinations.get(destination);
                } catch (NoSuchElementException& ex) {
                    audit.reset(new ActiveMQMessageAudit(auditDepth,
auditMaximumProducerNumber));
                    this->impl->destinations.put(destination, audit);
                    std::cout << "New destination audit: " <<
destination->toString() 
                              << ", size: " <<
this->impl->destinations.keySet().size() << std::endl;
                }

...and it prints...

Sent message #410 from thread 140736021874568
New destination audit: queue://TEST.FOO, size: 410
Message #410 Received: Hello world! from thread 140736021874568
Sent message #411 from thread 140736021874568
New destination audit: queue://TEST.FOO, size: 411
Message #411 Received: Hello world! from thread 140736021874568

So the size of the destinations map keeps increasing. It seems to think
every message has a new destination, but this is not the case. It's just the
example code in main.cpp which creates the TEST.FOO destination and sends
messages to it in a loop.





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