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From "stack (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9457) Master could fail start if region server with system table is down
Date Mon, 09 Sep 2013 19:58:53 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9457?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13762212#comment-13762212
] 

stack commented on HBASE-9457:
------------------------------

[~jxiang] That would be good if we could get away w/ that.  In the past we had a 'historian'
table into which we wrote all cluster events.  We used to have interesting issues where the
historian was not available when user tables were trying to report they were splitting or
closing so we used to try and  ensure it was opened first and closed last.  If we were to
do the same thing today -- or have a metrics system table -- then we'd want it up always and
up before user tables came on line... but maybe that is too hard to ensure?  And maybe stepped
assign is for post 0.96?  i.e. we should undo the special casing of namespace system table?
 [~toffer]?
                
> Master could fail start if region server with system table is down
> ------------------------------------------------------------------
>
>                 Key: HBASE-9457
>                 URL: https://issues.apache.org/jira/browse/HBASE-9457
>             Project: HBase
>          Issue Type: Bug
>          Components: master, Region Assignment
>            Reporter: Jimmy Xiang
>            Assignee: Jimmy Xiang
>            Priority: Critical
>
> In the region server holding the system table is killed while master is starting, master
will hang there waiting for system table to be assigned which won't happen.

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