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From "Jimmy Xiang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-10333) Assignments are not retained on a cluster start
Date Tue, 14 Jan 2014 21:53:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-10333?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13871254#comment-13871254

Jimmy Xiang commented on HBASE-10333:

Yes, 0.94 is safe.  The issue happens only in 0.96+, and when the meta is in transition while
the cluster is restarted.

> Assignments are not retained on a cluster start
> -----------------------------------------------
>                 Key: HBASE-10333
>                 URL: https://issues.apache.org/jira/browse/HBASE-10333
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Devaraj Das
>            Assignee: Jimmy Xiang
> When a cluster is fully shutdown and then started up again with hbase.master.startup.retainassign
set to true, I noticed that the assignments are not retained. Upon digging, it seems like
HBASE-10101 made a change due to which the server holding the META previously is added to
dead-servers (in _HMaster.assignMeta_). Later on, this makes the AssignmentManager think that
the master recovered from a failure as opposed to a fresh cluster start (the ServerManager.deadServers
list is not empty in the check within 
> _AssignmentManager.processDeadServersAndRegionsInTransition_)

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