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https://issues.apache.org/jira/browse/HBASE-22723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16892968#comment-16892968
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stack commented on HBASE-22723:
-------------------------------
Here is sample line emitted after CatalogJanitor runs when incidents of holes,
overlaps, unknown server, empty regioninfo. Let me make it actionable in a
follow-on by adding report output to an html/json page browsable by operator.
{code}
2019-07-25 10:11:32,371 WARN [Time-limited test] master.CatalogJanitor(173):
hole=t1,bbb,1564074672312.ac2937ca76ec546fad94322c9910b2d3./t1,ddd,1564074672312.ccbed12902af2377c956d704154a9cd5.,
hole=t1,zzz,1564074672312.16d5f9183f825d486e1b730e9c71cbc4./t2,bbb,1564074676649.5610791e8e3880ece0cc0cc0bf764b3d.,
overlap=t3,,1564074678910.be917540ce2a7179a8060225edacff21./t3,0,1564074683252.e000321e486f45409723216c18d88a28.,
overlap=t3,0,1564074683252.e000321e486f45409723216c18d88a28./t3,1,1564074683252.f820e4da73e2ee69a38222412a1a92ae.,
overlap=t3,1,1564074683252.f820e4da73e2ee69a38222412a1a92ae./t3,bbb,1564074678910.5f98d31f0393f799bd51dd21b15150f3.,
empty=t1,ccc,1564074672312.a348344898a299022b08a211ce9b8b8c.,
unknown_server=bad.server.example.org,1234,1564074666669/t1,bbb,1564074672312.ac2937ca76ec546fad94322c9910b2d3.
{code}
> Have CatalogJanitor report holes and overlaps; i.e. problems it sees when
> doing its regular scan of hbase:meta
> --------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-22723
> URL: https://issues.apache.org/jira/browse/HBASE-22723
> Project: HBase
> Issue Type: Sub-task
> Reporter: stack
> Priority: Major
> Attachments: HBASE-22723.branch-2.001.patch
>
>
> CatalogJanitor scans hbase:meta on a configurable period. Currently it just
> looks for splits and merges to gc. Might as well generate a report on stuff
> like holds, overlaps, empty regioninfos, and unknown servers while it is at
> it.
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