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https://issues.apache.org/jira/browse/HBASE-13885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14587404#comment-14587404
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Lars Hofhansl commented on HBASE-13885:
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Thanks. Committing tonight to all branches (after changing to use
ZKUtil.isEmpty).
> ZK watches leaks during snapshots
> ---------------------------------
>
> Key: HBASE-13885
> URL: https://issues.apache.org/jira/browse/HBASE-13885
> Project: HBase
> Issue Type: Bug
> Components: snapshots
> Affects Versions: 0.98.12
> Reporter: Abhishek Singh Chouhan
> Assignee: Lars Hofhansl
> Priority: Critical
> Fix For: 2.0.0, 0.98.14, 1.0.2, 1.2.0, 1.1.1
>
> Attachments: 13885-0.98-v2.txt, 13885-0.98-v3.txt, 13885-master.txt
>
>
> When taking snapshot of a table a watcher over
> /hbase/online-snapshot/abort/snapshot-name is created which is never cleared
> when the snapshot is successful. If we use snapshots to take backups daily we
> accumulate a lot of watches.
> Steps to reproduce -
> 1) Take snapshot of a table - snapshot 'table_1', 'abc'
> 2) Run the following on zk node or alternatively observe zk watches metric
> echo "wchc" | nc localhost 2181
> /hbase/online-snapshot/abort/abc can be found.
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