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From "Enis Soztutar (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-9445) Snapshots should create column family dirs for empty regions
Date Tue, 05 Nov 2013 19:42:20 GMT

    [ https://issues.apache.org/jira/browse/HBASE-9445?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13814186#comment-13814186
] 

Enis Soztutar commented on HBASE-9445:
--------------------------------------

bq. do you want include the test that was in the first patch?
That test fails even with this patch. The reason is that we are snapshotting a table with
a single region, and with no store files. The snapshot region will not contain a directory
for the family (as per issue description) hence the validation still fails.  

> Snapshots should create column family dirs for empty regions
> ------------------------------------------------------------
>
>                 Key: HBASE-9445
>                 URL: https://issues.apache.org/jira/browse/HBASE-9445
>             Project: HBase
>          Issue Type: Bug
>          Components: snapshots
>            Reporter: Enis Soztutar
>            Assignee: Enis Soztutar
>             Fix For: 0.98.0, 0.96.1
>
>         Attachments: hbase-9445_v1.patch, hbase-9445_v2.patch, hbase-9445_v3.patch
>
>
> Currently, taking a snapshot will not create the family directory under a region if the
family does not have any files in it. 
> Subsequent verification fails because of this. There is some logic in the SnapshotTestingUtils.confirmSnapshotValid()
to deal with empty family directories, but I think we should create the family directories
regardless of whether there are any hfiles referencing them. 
> {code}
> 2013-09-05 11:07:21,566 DEBUG [Thread-208] util.FSUtils(1687): |-data/
> 2013-09-05 11:07:21,567 DEBUG [Thread-208] util.FSUtils(1687): |----default/
> 2013-09-05 11:07:21,568 DEBUG [Thread-208] util.FSUtils(1687): |-------test/
> 2013-09-05 11:07:21,569 DEBUG [Thread-208] util.FSUtils(1687): |----------.tabledesc/
> 2013-09-05 11:07:21,570 DEBUG [Thread-208] util.FSUtils(1690): |-------------.tableinfo.0000000001
> 2013-09-05 11:07:21,570 DEBUG [Thread-208] util.FSUtils(1687): |----------.tmp/
> 2013-09-05 11:07:21,571 DEBUG [Thread-208] util.FSUtils(1687): |----------accd6e55887057888de758df44dacda7/
> 2013-09-05 11:07:21,572 DEBUG [Thread-208] util.FSUtils(1690): |-------------.regioninfo
> 2013-09-05 11:07:21,572 DEBUG [Thread-208] util.FSUtils(1687): |-------------fam/
> 2013-09-05 11:07:21,555 DEBUG [Thread-208] util.FSUtils(1687): |-.hbase-snapshot/
> 2013-09-05 11:07:21,556 DEBUG [Thread-208] util.FSUtils(1687): |----.tmp/
> 2013-09-05 11:07:21,557 DEBUG [Thread-208] util.FSUtils(1687): |----offlineTableSnapshot/
> 2013-09-05 11:07:21,558 DEBUG [Thread-208] util.FSUtils(1690): |-------.snapshotinfo
> 2013-09-05 11:07:21,558 DEBUG [Thread-208] util.FSUtils(1687): |-------.tabledesc/
> 2013-09-05 11:07:21,558 DEBUG [Thread-208] util.FSUtils(1690): |----------.tableinfo.0000000001
> 2013-09-05 11:07:21,559 DEBUG [Thread-208] util.FSUtils(1687): |-------.tmp/
> 2013-09-05 11:07:21,559 DEBUG [Thread-208] util.FSUtils(1687): |-------accd6e55887057888de758df44dacda7/
> 2013-09-05 11:07:21,560 DEBUG [Thread-208] util.FSUtils(1690): |----------.regioninfo
> {code}
> I think this is important for 0.96.0. 



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