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From "Tim Bain (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMQ-5362) Consider a consumer slow if messages expire before it processes them
Date Tue, 16 Sep 2014 16:53:34 GMT
Tim Bain created AMQ-5362:
-----------------------------

             Summary: Consider a consumer slow if messages expire before it processes them
                 Key: AMQ-5362
                 URL: https://issues.apache.org/jira/browse/AMQ-5362
             Project: ActiveMQ
          Issue Type: Improvement
          Components: Broker
    Affects Versions: 5.10.0
            Reporter: Tim Bain


If a consumer is consistently consuming messages slower than the producer is producing them
and the messages have an expiration date, messages will eventually expire before the producer
can consume them.  When this occurs, the consumer should be considered slow, but neither of
the two existing slow consumer strategies (AbortSlowConsumerStrategy, which requires undispatched
messages on the broker equal to the consumer's prefetch buffer size, and AbortSlowAckConsumerStrategy,
which requires the consumer to take longer than a certain amount of time to process any given
message) will identify this slowness and react to it.  There are scenarios where they will,
but it's easy to create one where they don't.

This feature would be best implemented along with AMQ-5361, which would allow us to use more
than one slow consumer strategy at the same time, since it's unlikely that we'd want to use
this strategy *instead of* one of the other two.



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