Topic subscriber is assumed to be slow consumer when prefetch is set to one.
------------------------------------------------------------------------------
Key: AMQ-3733
URL: https://issues.apache.org/jira/browse/AMQ-3733
Project: ActiveMQ
Issue Type: Bug
Components: Broker
Affects Versions: 5.5.1
Reporter: Pat Fox
Attachments: TopicSubscriptionSlowConsumerTest.patch
The broker checks for slow subscribers by checking its dispatch queue size
against the prefetch size. If the dispatch queue is greater than or equal to
the prefetch size the broker treats this subscription is a slow subscriber.
However if the subscribers prefetch size is "1" then the subscription will get
treated as a slow subscriber even if the messages do not remain long in the
subscription. This can result in a lot of warning log statements
{code}
"TopicSubscription: consumer=... has reached its prefetch limit without an ack,
it appears to be slow"
{code}
and slow consumer advisory messages being generated if
"AdvisoryForSlowConsumers" has been turned on.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
