[jira] [Commented] (HBASE-22923) hbase:meta is assigned to localhost when we downgrade the hbase version

["Anoop Sam John (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/HBASE-22923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16925357#comment-16925357 ] 

Anoop Sam John commented on HBASE-22923:
----------------------------------------

bq.1.Down grade all servers in HBASE_META first
Is this order imp? The versions in nodes of system group can be kept higher only while panning this upgrade/downgrade?
Can u explain why this sequence was a must?

> hbase:meta is assigned to localhost when we downgrade the hbase version
> -----------------------------------------------------------------------
>
>                 Key: HBASE-22923
>                 URL: https://issues.apache.org/jira/browse/HBASE-22923
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 1.4.8
>            Reporter: wenbang
>            Priority: Major
>
> When we downgrade the hbase version（rsgroup enable）, we found that the hbase:meta table could not be assigned.
> {code:java}
> master.AssignmentManager: Failed assignment of hbase:meta,,1.1588230740 to localhost,1,1, trying to assign elsewhere instead; try=1 of 10 java.io.IOException: Call to localhost/127.0.0.1:1 failed on local exception: org.apache.hadoop.hbase.ipc.FailedServerException: This server is in the failed servers list: localhost/127.0.0.1:1
> {code}
> hbase group list:
>   HBASE_META group（hbase:meta and other system tables）
>   default group
> 1.Down grade all servers in HBASE_META first
> 2.higher version servers is in default
> 3.hbase:meta assigned to localhost
> For system table, we assign them to a server with highest version.
> AssignmentManager#getExcludedServersForSystemTable
> But did not consider the rsgroup.



--
This message was sent by Atlassian Jira
(v8.3.2#803003)