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From "Patrick Hunt (JIRA)" <j...@apache.org>
Subject [jira] Updated: (ZOOKEEPER-601) allow configuration of session timeout min/max bounds
Date Fri, 19 Feb 2010 21:54:28 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

Patrick Hunt updated ZOOKEEPER-601:

    Status: Patch Available  (was: Open)

> allow configuration of session timeout min/max bounds
> -----------------------------------------------------
>                 Key: ZOOKEEPER-601
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-601
>             Project: Zookeeper
>          Issue Type: Improvement
>          Components: server
>    Affects Versions: 3.2.1
>            Reporter: Patrick Hunt
>            Assignee: Patrick Hunt
>             Fix For: 3.3.0
>         Attachments: ZOOKEEPER-601.patch
> ZK servers currently enforce a min/max boundary on client session timeout relative to
the ticktime setting, detailed here:
> http://hadoop.apache.org/zookeeper/docs/current/zookeeperProgrammers.html#ch_zkSessions
> In general there are good reasons for this however in some cases, in particular with
HBase region servers, we have seen a need to allow this bound to be set differently (higher).
The Sun jvm can GC pause for very long times (in some cases we've seen 4 minutes even with
the "realtime" gc.
> It would be good to allow this bound to be set via configuration parameters. 
> Note: 4letterword and JMX integration would be needed.

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