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https://issues.apache.org/jira/browse/AMQ-5003?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timothy Bish resolved AMQ-5003.
-------------------------------

    Resolution: Fixed

Added a gate to keep the session from repeating the clear in progress message 
consumers action until the last one finishes.

> On overlapping Failover a session can consume large amounts of memory trying 
> to clear consumer state.
> -----------------------------------------------------------------------------------------------------
>
>                 Key: AMQ-5003
>                 URL: https://issues.apache.org/jira/browse/AMQ-5003
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: Broker
>    Affects Versions: 5.9.0
>            Reporter: Timothy Bish
>             Fix For: 5.10.0
>
>
> If a consumer onMessage call is blocked waiting for failover to complete and 
> send an ack and the connection to the broker is dropping as attempts to 
> reconnect are happening a session can queue up very large number of scheduler 
> tasks to clear in progress messages for open consumers.  Since the consumer 
> will be holding the lock these can't fire so they just pile on.  



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