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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (HBASE-19813) clone_snapshot fails with region failing to open when RS group feature is enabled
Date Tue, 27 Feb 2018 19:17:00 GMT

     [ https://issues.apache.org/jira/browse/HBASE-19813?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Ted Yu resolved HBASE-19813.
----------------------------
    Resolution: Duplicate

Dup of HBASE-17785 

> clone_snapshot fails with region failing to open when RS group feature is enabled
> ---------------------------------------------------------------------------------
>
>                 Key: HBASE-19813
>                 URL: https://issues.apache.org/jira/browse/HBASE-19813
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Ted Yu
>            Priority: Major
>
> The following scenario came from support case.
> In cluster 1, create RS group rsg. Move table to rsg group.
> Take snapshot of the table and copy the snapshot to cluster 2 where there is no group
called rsg.
> Cloning snapshot to table new_t4 on cluster 2 fails :
> {code}
> 2018-01-09 11:45:30,468 INFO  [RestoreSnapshot-pool68-t1] regionserver.HRegion: Closed
new_t4,,1514454789243.a6173d2955182ac5bde208301681c6af.
> 2018-01-09 11:45:30,468 INFO  [MASTER_TABLE_OPERATIONS-shubh1-1:16000-0] snapshot.CloneSnapshotHandler:
Clone snapshot=snap_t3 on table=new_t4 completed!
> 2018-01-09 11:45:30,492 INFO  [MASTER_TABLE_OPERATIONS-shubh1-1:16000-0] hbase.MetaTableAccessor:
Added 1
> 2018-01-09 11:45:30,492 WARN  [MASTER_TABLE_OPERATIONS-shubh1-1:16000-0] rsgroup.RSGroupBasedLoadBalancer:
Group for table new_t4 is null
> 2018-01-09 11:45:30,492 DEBUG [MASTER_TABLE_OPERATIONS-shubh1-1:16000-0] rsgroup.RSGroupBasedLoadBalancer:
Group Information found to be null. Some regions might be unassigned.
> 2018-01-09 11:45:30,492 WARN  [MASTER_TABLE_OPERATIONS-shubh1-1:16000-0] master.RegionStates:
Failed to open/close a6173d2955182ac5bde208301681c6af on null, set to FAILED_OPEN
> {code}
> Here is related code from RSGroupBasedLoadBalancer:
> {code}
>         List<ServerName> candidateList = filterOfflineServers(info, servers);
>         for (RegionInfo region : regionList) {
>           currentAssignmentMap.put(region, regions.get(region));
>         }
>         if(candidateList.size() > 0) {
>           assignments.putAll(this.internalBalancer.retainAssignment(
>               currentAssignmentMap, candidateList));
> {code}
> candidateList is empty for table new_t4, leaving region for the table in FAILED_OPEN
state.



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