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https://issues.apache.org/jira/browse/HBASE-8144?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13614341#comment-13614341
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Jimmy Xiang commented on HBASE-8144:
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bq. With this patch we may try to reassign to another RS (may be double
assignment), without this patch we may not update the master's memory.
Agree. If we are very unlucky, closeRegion fails in competing with
OpenRegionHandler, there could be double-assignment. I will attach a new patch
to close the region again in AM#handleRegion, just in case.
> Limit number of attempts to assign a region
> -------------------------------------------
>
> Key: HBASE-8144
> URL: https://issues.apache.org/jira/browse/HBASE-8144
> Project: HBase
> Issue Type: Bug
> Components: Region Assignment
> Reporter: Jimmy Xiang
> Assignee: Jimmy Xiang
> Priority: Minor
> Fix For: 0.95.0, 0.98.0
>
> Attachments: trunk-8144.patch, trunk-8144_v2.patch,
> trunk-8144_v3.patch
>
>
> In sending a region open request to a region server, we make sure we try at
> most some configured times. However, once the request is accepted by the
> region server, the region could go through this transition forever:
> failed_open (in ZK) => closed => opening => failed_open (in ZK), assuming no
> RPC/network issue.
> It will be good to break the loop and limit the number of tries and move the
> region to failed_open state (will be introduced in HBASE-8137)
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