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https://issues.apache.org/jira/browse/ZOOKEEPER-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15270317#comment-15270317
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Ed Rowe commented on ZOOKEEPER-2420:
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Sure. I won't be able to get to it for a few days but I can put something
together.
> Autopurge deletes log file prior to oldest retained snapshot even though
> restore may need it
> --------------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-2420
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2420
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Reporter: Ed Rowe
>
> Autopurge retains all log files whose zxid are >= the zxid of the oldest
> snapshot file that it is going to retain (in PurgeTxnLog
> retainNRecentSnapshots()). Given that loading the database from
> snapshots/logs will start with the log file _prior_ to the snapshot's zxid,
> autopurge should retain the log file prior to the oldest retained snapshot as
> well, unless it verifies that it contains no zxids beyond what the snapshot
> contains.
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