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From "Jeffrey Zhong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-8251) enable SSH before assign META on Master startup
Date Fri, 05 Apr 2013 21:47:16 GMT

    [ https://issues.apache.org/jira/browse/HBASE-8251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13624095#comment-13624095
] 

Jeffrey Zhong commented on HBASE-8251:
--------------------------------------

[~rajesh23] brought me attention to this JIRA. Basically I saw similar issue during test against
the patch for bhase-7824. The solution I'm using for the issue is that

2) Assign ROOT
3) Enable SSH for ROOT only not others
4) Assign META
5) Enable SSH globally

The above solution is less intrusive. The existing patch for the JIRA might also have double
assignment issue because meta assignment could happen in both places: master initialization
and META SSH.

Please let me know what you think.

Thanks,
-Jeffrey
                
> enable SSH before assign META on Master startup
> -----------------------------------------------
>
>                 Key: HBASE-8251
>                 URL: https://issues.apache.org/jira/browse/HBASE-8251
>             Project: HBase
>          Issue Type: Bug
>          Components: master, Region Assignment
>    Affects Versions: 0.94.6
>            Reporter: Jieshan Bean
>            Assignee: Jieshan Bean
>         Attachments: HBASE-8251-94.patch
>
>
> I think HBASE-5918 could not fix this issue. In HMaster#assignRootAndMeta:
> 1. Assign ROOT.
> 2. Block until ROOT be opened.
> 3. Assign META.
> 4. Block until META be opened.
> SSH is enabled after step 4. So if the RS who host ROOT dies before step 4, master will
be blocked.

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