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From "Jim Kellerman (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1157) If we do not take start code as a part of region server recovery, we could inadvertantly try to reassign regions assigned to a restarted server with a different start code
Date Tue, 27 Jan 2009 03:02:59 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1157?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12667570#action_12667570
] 

Jim Kellerman commented on HBASE-1157:
--------------------------------------

As 0.19.x does not allow a server with the same ip:port number to join the cluster until the
previous instance has been recovered, this is not an issue for 0.19.x. However, if we intend
to allow a new instance of the same server to start serving regions, we need to be able to
differentiate between the dead instance and the new one.

This is my primary reason for making the startcode a part of the regionserver identification.

While we might use a different mechanism after ZK integration, the ZK integration still needs
to account for what instance
of the regionserver it is dealing with.


> If we do not take start code as a part of region server recovery, we could inadvertantly
try to reassign regions assigned to a restarted server with a different start code
> ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1157
>                 URL: https://issues.apache.org/jira/browse/HBASE-1157
>             Project: Hadoop HBase
>          Issue Type: Bug
>          Components: master, regionserver
>    Affects Versions: 0.20.0
>            Reporter: Jim Kellerman
>            Assignee: Jim Kellerman
>             Fix For: 0.20.0
>
>


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