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https://issues.apache.org/jira/browse/HBASE-13885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582973#comment-14582973
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Lars Hofhansl commented on HBASE-13885:
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So apparently before ZOOKEEPER-442 we must trigger a watch in order to remove
it. Otherwise the watches will linger and accumulate.
[~jesse_yates], [~mbertozzi], any ideas?
> 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
> Priority: Critical
>
> 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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