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https://issues.apache.org/jira/browse/ZOOKEEPER-2994?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Patrick Hunt updated ZOOKEEPER-2994:
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    Fix Version/s: 3.4.13

> Tool required to recover log and snapshot entries with CRC errors
> -----------------------------------------------------------------
>
>                 Key: ZOOKEEPER-2994
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2994
>             Project: ZooKeeper
>          Issue Type: New Feature
>    Affects Versions: 3.5.4, 3.6.0, 3.4.13
>            Reporter: Andor Molnar
>            Assignee: Andor Molnar
>            Priority: Major
>             Fix For: 3.5.4, 3.6.0, 3.4.13
>
>
> In the even that the zookeeper transaction log or snapshot become corrupted 
> and fail CRC checks (preventing startup) we should have a mechanism to get 
> the cluster running again.
> Previously we achieved this by loading the broken transaction log with a 
> modified version of ZK with disabled CRC check and forced it to snapshot.
> It'd very handy to have a tool which can do this for us. LogFormatter and 
> SnapshotFormatter have already been designed to dump log and snapshot files, 
> it'd be nice to extend their functionality and add ability for such recovery.
> It has proven that once you end up with the corrupt txn log there is no way 
> to recover except manually modifying the crc check. That's basically why the 
> tool is needed.



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