rajeshbabu created HBASE-7923:
---------------------------------
Summary: 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: 0.96.0
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}
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