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Posted to dev@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2009/01/14 02:18:59 UTC

[jira] Updated: (HBASE-1124) Balancer kicks in way too early

     [ https://issues.apache.org/jira/browse/HBASE-1124?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

stack updated HBASE-1124:
-------------------------

    Attachment: 1124.patch

This patch makes it so if a regionserver report includes N 'opening' messages, then we do not let the balancer run and add close messages to the message back.   Currently N is set to 3.  If > 3 opening messages, we'll not let balancer have a say.  We just skip it.

Testing it on my small cluster with 1400 regions on 4 nodes, it started without balancer running.

> Balancer kicks in way too early
> -------------------------------
>
>                 Key: HBASE-1124
>                 URL: https://issues.apache.org/jira/browse/HBASE-1124
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: Andrew Purtell
>             Fix For: 0.19.0
>
>         Attachments: 1124.patch
>
>
> Balancer kicks in before all regions are assigned out. Causes confusion. Master won't accept OPENs from "overloaded" HRS. Master is slow to respond to UI and HRS during. Master sometimes takes too long to respond to a HRS heartbeat and so the HRS will reinit. This causes more confusion.

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