[jira] [Assigned] (AMQ-7126) Prevent OOM when recovering KahaDB and memory space is insufficient to load full page

["Jamie goodyear (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/AMQ-7126?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jamie goodyear reassigned AMQ-7126:
-----------------------------------

    Assignee: Jamie goodyear

> Prevent OOM when recovering KahaDB and memory space is insufficient to load full page
> -------------------------------------------------------------------------------------
>
>                 Key: AMQ-7126
>                 URL: https://issues.apache.org/jira/browse/AMQ-7126
>             Project: ActiveMQ
>          Issue Type: Bug
>    Affects Versions: 5.15.8
>            Reporter: Heath Kesler
>            Assignee: Jamie goodyear
>            Priority: Critical
>         Attachments: OOM.patch, amq7126.patch
>
>
> We have some brokers that are having OOM issues (on reboot) after having accepted messages without OOM. We investigated the problem and diagnosed that this happens when we attempt to load a full page during recovery.
> If we update KahaDBStore recoverNextMessage to use the following:
> "if (counter >= maxReturned || !listener.hasSpace())"
> To check if we have enough space to load the next message, than our OOM is averted.
> AMQ-4495 had the above change that was backed out due to performance concerns, our testing does not show us a degradation - perhaps we could provide an optional parameter to use this code?



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