Github user alopresto commented on the issue:

    https://github.com/apache/nifi/pull/2445
  
    I ran this with an ActiveMQ instance in Docker and a [simple 
flow](https://gist.github.com/alopresto/aec7eadd2ed8affd7be8e4056699e5f4) which 
published JMS messages to a queue and then consumed them. It ran very well at 
first, and I saw 10 threads on the ConsumeJMS once I configured it that way. 
But after starting and stopping a few times, the ActiveMQ admin panel showed 30 
consumers (3 times start/stopping 10 consumers) and no messages were being 
consumed anymore. I have attached the bootstrap log which should have the 
thread dump contents. 


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