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https://issues.apache.org/jira/browse/AMQ-7118?focusedWorklogId=330718&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-330718
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ASF GitHub Bot logged work on AMQ-7118:
---------------------------------------

                Author: ASF GitHub Bot
            Created on: 18/Oct/19 18:49
            Start Date: 18/Oct/19 18:49
    Worklog Time Spent: 10m 
      Work Description: jbonofre commented on pull request #326: AMQ-7118: fix 
issue with the unchanged acknowledgement map.
URL: https://github.com/apache/activemq/pull/326
 
 
   
 
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Issue Time Tracking
-------------------

    Worklog Id:     (was: 330718)
    Time Spent: 20m  (was: 10m)

> KahaDB store limit can be exceeded with durable subscribers.
> ------------------------------------------------------------
>
>                 Key: AMQ-7118
>                 URL: https://issues.apache.org/jira/browse/AMQ-7118
>             Project: ActiveMQ
>          Issue Type: Bug
>          Components: KahaDB
>    Affects Versions: 5.16.0, 5.15.8
>         Environment: JDK 8
>            Reporter: Jamie Mark Goodyear
>            Priority: Critical
>             Fix For: 5.16.0, 5.15.8
>
>         Attachments: kahaCommands.jpg
>
>          Time Spent: 20m
>  Remaining Estimate: 0h
>
> KahaDB store limit can be exceeded with durable subscribers.
> AMQ with store limit set, we can observe that the usage continues to increase 
> AFTER PFC is engaged. Given time, this growth stabilizes. The issue of having 
> exceeded the store limit remains.
> See below output from KahaDB dump in attachments:
> This appears to be caused by checkpointAckMessageFileMap. The log files are 
> not GC'd, and the KAHA_ACK_MESSAGE_FILE_MAP_COMMAND is replicated and the DB 
> log files continue to expand - this can become exponential. Side effect of 
> also not checking storage size in checkpoint update can cause the DB log 
> files to exceed any set limits. The real critical part is the duplicated and 
> leaking Kaha messages which appears to happen with durable subscribers.
>  
>  
>  



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