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From "Esteban Gutierrez (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18024) HRegion#initializeRegionInternals should not re-create .hregioninfo file when the region directory no longer exists
Date Tue, 08 Aug 2017 21:39:00 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18024?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16119068#comment-16119068
] 

Esteban Gutierrez commented on HBASE-18024:
-------------------------------------------

New patch adds an extra step in {{HRegion.initializeRegionInternals(}}:
{code}
if (this.getRegionInfo().getReplicaId() == HRegionInfo.DEFAULT_REPLICA_ID) {
      status.setStatus("Writing region info on filesystem");
      fs.checkRegionInfoOnFilesystem();
}
{code}
Which basically only allows the primary replica to create a new {{.regioninfo}} when a region
is instantiated.

> HRegion#initializeRegionInternals should not re-create .hregioninfo file when the region
directory no longer exists
> -------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-18024
>                 URL: https://issues.apache.org/jira/browse/HBASE-18024
>             Project: HBase
>          Issue Type: Bug
>          Components: Region Assignment, regionserver
>    Affects Versions: 2.0.0, 1.4.0, 1.3.1, 1.2.5
>            Reporter: Esteban Gutierrez
>            Assignee: Esteban Gutierrez
>         Attachments: HBASE-18024.001.patch, HBASE-18024.002.patch
>
>
> When a RegionSever attempts to open a region, during initialization the RS tries to open
the {{<hbase.root.dir>/data/<table>/<region>/.hregioninfo}} file, however
if the {{.hregioninfofile}} doesn't exist, the RegionServer will create a new one on {{HRegionFileSystem#checkRegionInfoOnFilesystem}}.
A side effect of that tools like hbck will incorrectly assume an inconsistency due the presence
of this new {{.hregioninfofile}}



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