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From "stack (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-1761) getclosest doesn't understand delete family; manifests as "HRegionInfo was null or empty in .META" A.K.A the BS problem
Date Sat, 15 Aug 2009 04:56:14 GMT

    [ https://issues.apache.org/jira/browse/HBASE-1761?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12743545#action_12743545
] 

stack commented on HBASE-1761:
------------------------------

Ryan wants to run some tests.  Assigning issue to him (Assignment will expire soon since he's
off on holidays).

I ran tests on my small cluster to ensure this doesn't slow things down.  It doesn't.

> getclosest doesn't understand delete family; manifests as "HRegionInfo was null or empty
in .META" A.K.A the BS problem
> -----------------------------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-1761
>                 URL: https://issues.apache.org/jira/browse/HBASE-1761
>             Project: Hadoop HBase
>          Issue Type: Bug
>            Reporter: stack
>             Fix For: 0.20.0
>
>         Attachments: 1761-v10.patch, 1761-v11.patch, 1761-v2.patch, 1761-v3.patch, 1761-v4.patch,
1761-v5.patch, 1761-v6.patch, 1761-v7.patch, 1761-v9.patch, 1761.patch
>
>
> getclosestatorbefore was not converted to deal with the new delete types.  It only knows
how to process old style deletes.  Usually all is well as edits come in but its possible to
get into state where you have persisted in one file a deletefamily for all in meta and in
the file behind it, there are entries on the info family.  Since closest doesn't understand
deletefamily, it will return the Put rows only for the subsequent getfull, which knows how
to work with deletefamilies fail.
> Once this happens, table is hosed.  Seen on Bradford Stephens upload and at Powerset.
 "Fix" is flush and major compact.  Gives impression that hbase is 'delicate'.  Fixing.

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