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https://issues.apache.org/jira/browse/HBASE-20943?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16584476#comment-16584476
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huaxiang sun commented on HBASE-20943:
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I am going to commit it tonight, will put [~jinghanx]'s userid in the Author
field.
> Add offline/online region count into metrics
> --------------------------------------------
>
> Key: HBASE-20943
> URL: https://issues.apache.org/jira/browse/HBASE-20943
> Project: HBase
> Issue Type: Improvement
> Components: metrics
> Affects Versions: 2.0.0, 1.2.6.1
> Reporter: Tianying Chang
> Assignee: jinghan xu
> Priority: Minor
> Attachments: HBASE-20943-master-v1.patch,
> HBASE-20943-master-v2.patch, HBASE-20943-master-v3.patch, HBASE-20943.patch,
> Screen Shot 2018-07-25 at 2.51.19 PM.png
>
>
> We intensively use metrics to monitor the health of our HBase production
> cluster. We have seen some regions of a table stuck and cannot be brought
> online due to AWS issue which cause some log file corrupted. It will be good
> if we can catch this early. Although WebUI has this information, it is not
> useful for automated monitoring. By adding this metric, we can easily monitor
> them with our monitoring system.
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