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From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-19144) [RSgroups] Retry assignments in FAILED_OPEN state when servers (re)join the cluster
Date Thu, 02 Nov 2017 18:23:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-19144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16236323#comment-16236323
] 

Lars Hofhansl commented on HBASE-19144:
---------------------------------------

Looks good.

This was just plain wrong before, right (nothing to do with this change)?
{code}
-      while(!mgr.master.isAborted() || !mgr.master.isStopped()) {
+      while (!mgr.master.isAborted() && !mgr.master.isStopped()) {
{code}


while (!hasChanged) ?
{code}
+            if (!hasChanged) {
+              wait();
+            }
{code}


> [RSgroups] Retry assignments in FAILED_OPEN state when servers (re)join the cluster
> -----------------------------------------------------------------------------------
>
>                 Key: HBASE-19144
>                 URL: https://issues.apache.org/jira/browse/HBASE-19144
>             Project: HBase
>          Issue Type: Bug
>            Reporter: Andrew Purtell
>            Assignee: Andrew Purtell
>            Priority: Major
>             Fix For: 2.0.0, 3.0.0, 1.4.0, 1.5.0
>
>         Attachments: HBASE-19144-branch-1.patch, HBASE-19144.patch
>
>
> After all servers in the RSgroup are down the regions cannot be opened anywhere and transition
rapidly into FAILED_OPEN state.
>  
> 2017-10-31 21:06:25,449 INFO [ProcedureExecutor-13] master.RegionStates: Transition {c6c8150c9f4b8df25ba32073f25a5143
state=OFFLINE, ts=1509483985448, server=node-5.cluster,16020,1509482700768} to {c6c8150c9f4b8df25ba32073f25a5143
state=FAILED_OPEN, ts=1509483985449, server=node-5.cluster,16020,1509482700768}
> 2017-10-31 21:06:25,449 WARN [ProcedureExecutor-13] master.RegionStates: Failed to open/close
d4e2f173e31ffad6aac140f4bd7b02bc on node-5.cluster,16020,1509482700768, set to FAILED_OPEN
>  
> Any region in FAILED_OPEN state has to be manually reassigned, or the master can be restarted
and this will also cause reattempt of assignment of any regions in FAILED_OPEN state. This
is not unexpected but is an operational headache. It would be better if the RSGroupInfoManager
could automatically kick reassignments of regions in FAILED_OPEN state when servers rejoin
the cluster. 



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