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From "ramkrishna.s.vasudevan (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8144) Limit number of attempts to assign a region
Date Thu, 28 Mar 2013 11:05:15 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13616184#comment-13616184
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ramkrishna.s.vasudevan commented on HBASE-8144:
-----------------------------------------------

The unassign() added to handleRegion() when the znode is in RS_ZK_OPENED is great.
+1 on the patch.
                
> Limit number of attempts to assign a region
> -------------------------------------------
>
>                 Key: HBASE-8144
>                 URL: https://issues.apache.org/jira/browse/HBASE-8144
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Minor
>             Fix For: 0.95.0, 0.98.0
>
>         Attachments: trunk-8144.patch, trunk-8144_v2.patch, trunk-8144_v3.1.patch, trunk-8144_v3.2.patch,
trunk-8144_v3.patch
>
>
> In sending a region open request to a region server, we make sure we try at most some
configured times.  However, once the request is accepted by the region server, the region
could go through this transition forever: failed_open (in ZK) => closed => opening =>
failed_open (in ZK), assuming no RPC/network issue.
> It will be good to break the loop and limit the number of tries and move the region to
failed_open state (will be introduced in HBASE-8137)

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