Ibragim Ismailov created HBASE-9104:
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Summary: RegionChecker to track when regions go unavailable and
back opened
Key: HBASE-9104
URL: https://issues.apache.org/jira/browse/HBASE-9104
Project: HBase
Issue Type: New Feature
Components: monitoring, Region Assignment, regionserver
Reporter: Ibragim Ismailov
whenever region is closed/opened (due to region close, or regionserver
restart/abort/kill, regions reassigment, ...), we store this information in
zookeeper to know availability ratio of every region and whole cluster. So,
RegionChecker class does that and provides methods to get these ratios.
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