JMeter - IBM MQ - Connections Issue

Sachin Patel 0
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We have been doing performance testing of an application that uses IBM MQ. Through JMeter we are injecting the payload via a JMS Publisher. However, when running the test it can be observed that the connections from the JMeter threads are not being released. This effects the ability to reach the throughput and test failure due to the accumulation of threads. Is there a better alternative than using the JMS Publisher? Or is there setting there that needs to be enabled in order to release the connection once the request has been sent?

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https://www.blazemeter.com/blog/ibm-mq-tutorial - Is this the best practice to implement testing IBM MQ?

ibm-mq performance-testing jmeter
1 Answers

What are you trying to achieve? JMeter implements Object Pool Pattern so each JMeter thread (virtual user) creates its own JMS connection and on subsequent iterations of the JMS Publisher sampler the Publisher object is being returned from the pool rather than created from zero.

If this is not something you want (or not how your JMS application acts) and you would like to close the connection after posting a message to queue/topic you can achieve it quite easily using JSR223 PostProcessor and the following Groovy code:

def publisher = sampler.publisher
org.apache.jmeter.protocol.jms.client.ClientPool.removeClient(publisher)
org.apache.commons.io.IOUtils.closeQuietly(publisher, null)
sampler.publisher = null
Dmitri T0
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