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From "Anoop Sam John (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-18049) It is not necessary to re-open the region when MOB files cannot be found
Date Tue, 16 May 2017 02:09:04 GMT

    [ https://issues.apache.org/jira/browse/HBASE-18049?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16011627#comment-16011627
] 

Anoop Sam John commented on HBASE-18049:
----------------------------------------

A bug some where in the code makes this MOB data not found. The cell may be in some other
MOB file and we have an issue in the MOB ref cell read.  A solution to restore the state and
data is to do a MOB major compaction right?  May be we should add that info the error log
clearly.

> It is not necessary to re-open the region when MOB files cannot be found
> ------------------------------------------------------------------------
>
>                 Key: HBASE-18049
>                 URL: https://issues.apache.org/jira/browse/HBASE-18049
>             Project: HBase
>          Issue Type: Bug
>          Components: Scanners
>            Reporter: Jingcheng Du
>            Assignee: Jingcheng Du
>             Fix For: 2.0.0
>
>         Attachments: HBASE-18049.patch
>
>
> In HBASE-17712, we try to re-open the region when store files cannot be found. This is
useful for store files in a region, but is not necessary when the MOB files cannot be found,
because the store files in a region only contain the references to the MOB files and a re-open
of a region doesn't help the lost MOB files.
> In this JIRA, we will directly throw DNRIOE only when the MOB files are not found in
{{MobStoreScanner}} and {{ReversedMobStoreScanner}}. Other logics keep the same.



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