Wellington Chevreuil created HBASE-22707:
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Summary: [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: 2.1.5, 2.2.0, 2.3.0
Reporter: Wellington Chevreuil
Assignee: Wellington Chevreuil
Fix For: 2.3.0
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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