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From "Gary Tully (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-4621) Provide a polling SlowConsumerPolicy that uses LastAck time on a sub
Date Fri, 05 Jul 2013 20:17:47 GMT
Gary Tully created AMQ-4621:
-------------------------------

             Summary: Provide a polling SlowConsumerPolicy that uses LastAck time on a sub
                 Key: AMQ-4621
                 URL: https://issues.apache.org/jira/browse/AMQ-4621
             Project: ActiveMQ
          Issue Type: Improvement
    Affects Versions: 5.8.0
            Reporter: Gary Tully
             Fix For: 5.9.0


The existing AbortSlowConsumer policy is event driven. It depends on a consumer slow event
that is triggered when the prefetch is reached and there are subsequent dispatches.

With prefetch=0|1 there still needs to be throughput to determine that the consumer is slow
so one message can be pending if there are no new messages to sent to the destination.

Providing an alternative implementation that will periodically poll consumers for their last
ack time will be more deterministic. The slow advisory may never fire, but the consumer will
get aborted if it does not ack in a timely manner.

if lastAckTime exceeds the max and there are dispatched messages it can be a candidate for
removal.
Optionally lastAckTime exceeding and no dispatched messages can be a way to remove idle consumers.
Not sure if that is necessary.


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