[GitHub] k-wall commented on issue #2568: ARTEMIS-2262: Correlate management response messages with the request

[GitBox <gi...@apache.org>]

k-wall commented on issue #2568: ARTEMIS-2262: Correlate management response messages with the request
URL: https://github.com/apache/activemq-artemis/pull/2568#issuecomment-467790082
 
 
   > There's a checkstyle issue on your change. (easy to fix)
   > 
   > Can you provide a use case for why this is needed? is that for enMass?
   
   The context for this request is captured by https://issues.apache.org/jira/browse/ARTEMIS-2261.  In EnMasse's case, we programmatically control the Broker using Management over AMQP.  We currently rely on AMQP's dynamic node feature to create the reply-to queues.  Management responses are currently being lost when the Broker is full (global-max-size exceeded) because messages on the dynamically created nodes are subjected to paging which fails when the Broker is full (`[errorType=ADDRESS_FULL message=AMQ229102: Address "54111434-5686-4dbb-8a94-dd0182dbe7eb" is full.]`)
   
   Switching to non-dynamically created response queue named named in such a way to be excluded from the store (`org.apache.activemq.artemis.core.paging.impl.PagingManagerImpl#getPageStore`) is possible but the life cycling is tricky.   We have many applications collaborating in the management of the Broker and each currently needs a separate response queue in order to avoid cross-talk.  Lifecycling of these response queues ourselves is tricky.  You need to consider cases of abnormal shutdown etc.
   
   If this enhancement existed, we could share a single static management response queue amongst all the applications.  Correlation of requests and responses would avoid the cross-talk between applications or application instances.
   

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