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Posted to issues@hbase.apache.org by "Wellington Chevreuil (JIRA)" <ji...@apache.org> on 2019/08/01 10:07:00 UTC
[jira] [Commented] (HBASE-22707) [HBCK2] MasterRpcServices assigns
method should try to reload regions from meta if the passed regions isn't
found under AssignmentManager RegionsStateStore
[ https://issues.apache.org/jira/browse/HBASE-22707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16897939#comment-16897939 ]
Wellington Chevreuil commented on HBASE-22707:
----------------------------------------------
Closed the PR, prefer to merge commits locally and create a patch to master branch.
> [HBCK2] MasterRpcServices assigns method should try to reload regions from meta if the passed regions isn't found under AssignmentManager RegionsStateStore
> -----------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-22707
> URL: https://issues.apache.org/jira/browse/HBASE-22707
> Project: HBase
> Issue Type: Task
> Components: hbck2, master
> Affects Versions: 3.0.0, 2.2.0, 2.3.0, 2.1.5
> Reporter: Wellington Chevreuil
> Assignee: Wellington Chevreuil
> Priority: Major
> Fix For: 3.0.0, 2.3.0
>
> Attachments: HBASE-22707.branch-2.001.patch, HBASE-22707.master.001.patch
>
>
> Although HBCK2 related, this is a master side improvement. On situations where regions are missing in META, any online fix tool such as the one being implemented in HBASE-22567 would require a further master restart to get RegionsStateStore reloaded from META, so that master can be aware of the newly re-added regions.
> After regions are re-added to meta in CLOSED state, it should be possible to bring those by simply invoking hbck2 _assigns_ command. But before _MasterRpcServices.assigns_ submits an _Assign_ procedure, it validates first if the given region is available on _AssignmentManager.RegionsStateStore_. The current patch reloads meta on _MasterRpcServices.assigns_ if the given region is not found on the first lookup, then try a new lookup again before giving-up on region assignment.
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