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https://issues.apache.org/jira/browse/HBASE-24250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17099795#comment-17099795
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niuyulin commented on HBASE-24250:
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[~huaxiangsun] yes, You are right! The deleteMergeQualifiers method should be
idempotent ,but actually not .
the second run makes delete Columns into delete row , so it make hole
> CatalogJanitor resubmits GCMultipleMergedRegionsProcedure for the same region
> -----------------------------------------------------------------------------
>
> Key: HBASE-24250
> URL: https://issues.apache.org/jira/browse/HBASE-24250
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 2.2.4
> Environment: hdfs 3.1.3 with erasure coding
> hbase 2.2.4
> Reporter: Andrey Elenskiy
> Assignee: niuyulin
> Priority: Major
>
> If a lot of regions were merged (due to change of region sizes, for example),
> there can be a long backlog of procedures to clean up the merged regions. If
> going through this backlog is slower than the CatalogJanitor's scan interval,
> it will end resubmitting GCMultipleMergedRegionsProcedure for the same
> regions over and over again.
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