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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-13885) ZK watches leaks during snapshots
Date Fri, 12 Jun 2015 05:36:01 GMT

    [ https://issues.apache.org/jira/browse/HBASE-13885?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14582973#comment-14582973
] 

Lars Hofhansl commented on HBASE-13885:
---------------------------------------

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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