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https://issues.apache.org/jira/browse/ZOOKEEPER-2420?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15662891#comment-15662891
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Rakesh R commented on ZOOKEEPER-2420:
-------------------------------------
Thanks [~EdRowe] for the good work.
Hi All,
Like [~hanm] pointed out, both this jira and ZOOKEEPER-2574 are addressing same
case. Could you please look at [my comments in ZK-2574
jira|https://issues.apache.org/jira/browse/ZOOKEEPER-2574?focusedCommentId=15662873&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-15662873]
and let me know your thoughts. Based on your feedback will take an action.
Thanks!
> 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
> Assignee: Ed Rowe
> Attachments: ZOOKEEPER-2420.patch, ZOOKEEPER-2420.patch_v2,
> ZOOKEEPER-2420.patch_v3
>
>
> Autopurge retains all log files whose zxid are >= the zxid of the oldest
> snapshot file that it is going to retain (in PurgeTxnLog
> retainNRecentSnapshots()). However, unless there is a log file with the same
> zxid as the oldest snapshot file being retained (and whether log file and
> snapshot file zxids are equal is timing dependent), loading the database from
> snapshots/logs will start with the log file _prior_ to the snapshot's zxid.
> Thus, to avoid data loss 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 or there is a log file whose zxid ==
> snapshot zxid.
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