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Date: Wed, 27 Apr 2011 17:56:03 +0000 (UTC)
From: "Karthick Sankarachary (JIRA)" <jira@apache.org>
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Subject: [jira] [Commented] (HBASE-3773) Set ZK max connections much higher
 in 0.90
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    [ https://issues.apache.org/jira/browse/HBASE-3773?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13025920#comment-13025920 ] 

Karthick Sankarachary commented on HBASE-3773:
----------------------------------------------

Just FYI, HBASE-3777 attempts to address the underlying ZK connection overload issue, and one of the things that it does is set the max connections per IP (viz., HConnectionManager#MAX_CACHED_HBASE_INSTANCES) to the value specified in ""hbase.zookeeper.property.maxClientCnxns". Please let me know if that's the way to go.

> Set ZK max connections much higher in 0.90
> ------------------------------------------
>
>                 Key: HBASE-3773
>                 URL: https://issues.apache.org/jira/browse/HBASE-3773
>             Project: HBase
>          Issue Type: Improvement
>    Affects Versions: 0.90.2
>            Reporter: Jean-Daniel Cryans
>            Assignee: Jean-Daniel Cryans
>            Priority: Blocker
>             Fix For: 0.90.3
>
>
> I think by now we can all acknowledge that 0.90 has an issue with ZK connections, in that we create too many of them and it's also too easy for our users to shoot themselves in the foot.
> For 0.90.3, I think we should change the default configuration of 30 that we ship with and set it much much higher, I'm thinking of 32k.

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