[
https://issues.apache.org/jira/browse/HBASE-7923?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13589239#comment-13589239
]
Anoop Sam John commented on HBASE-7923:
---------------------------------------
One thing when normally the force unassign will be used? What are the use case
normally some one will use. When region is not handled by any RS but it is
there against an RS in HM's in memory state? Any other?
> force unassign can confirm region online on any RS to get rid of double
> assignments.
> ------------------------------------------------------------------------------------
>
> Key: HBASE-7923
> URL: https://issues.apache.org/jira/browse/HBASE-7923
> Project: HBase
> Issue Type: Improvement
> Reporter: rajeshbabu
> Assignee: rajeshbabu
> Fix For: 0.95.0
>
> Attachments: HBASE-7923_2.patch, HBASE-7923.patch
>
>
> Presently in force unassign we are offlining a region from AM and reassigning
> it, which may cause double assignments.
> {code}
> this.assignmentManager.regionOffline(hri);
> assignRegion(hri);
> {code}
> Any way if a region is not served by any RS we are offlining the region from
> AM.
> {code}
> if (t instanceof NotServingRegionException) {
> if (transitionInZK) {
> deleteClosingOrClosedNode(region);
> }
> regionOffline(region);
> return;
> }
> {code}
> We can change as below just to confirm whether region online on any RS.
> {code}
> this.assignmentManager.unassign(hri,force);
> if(!this.assignmentManager.getRegionStates().isRegionInTransition(hri) &&
> !this.assignmentManager.getRegionStates().isRegionAssigned(hri) ){
> assignRegion(hri);
> }
> {code}
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators
For more information on JIRA, see: http://www.atlassian.com/software/jira
