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From "Sergey Shelukhin (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8785) revise zookeeper session timeout setting
Date Wed, 07 Aug 2013 22:22:48 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8785?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13732838#comment-13732838
] 

Sergey Shelukhin commented on HBASE-8785:
-----------------------------------------

Yeah, sorry, that's what I meant, I assumed ZK is standalone most of the time so HBase settings
gets revised down to ZK setting.
The other thing is, I wonder if 40-60sec. could be enough of a timeout. Are we mostly afraid
of GC pauses or disproportionate action caused by small network hiccups?
                
> revise zookeeper session timeout setting
> ----------------------------------------
>
>                 Key: HBASE-8785
>                 URL: https://issues.apache.org/jira/browse/HBASE-8785
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.95.1
>            Reporter: Sergey Shelukhin
>            Assignee: stack
>            Priority: Critical
>             Fix For: 0.95.2
>
>
> Current ZK session timeout is set to 90sec., and the comment in the doc says: "This setting
becomes zookeeper's 'maxSessionTimeout'". However, this comment is misleading - it doesn't
always become maxSessionTimeout, min(our timeout, maxSessionTimeout) is chosen. Moreover,
the default maxSessionTimeout in ZK that I'm looking at is 40s, so this setting doesn't do
anything.
> Additionally, 40s. seems like a lot of time.
> 1) Should the comment be changed to tell the user to change ZK config if they want higher
timeout?
> 2) Should the setting be revised down?

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