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From "Ted Yu (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HBASE-10349) Table became unusable after taking snapshot, restoring snapshot and dropping table
Date Wed, 15 Jan 2014 22:48:26 GMT
Ted Yu created HBASE-10349:
------------------------------

             Summary: Table became unusable after taking snapshot, restoring snapshot and
dropping table
                 Key: HBASE-10349
                 URL: https://issues.apache.org/jira/browse/HBASE-10349
             Project: HBase
          Issue Type: Bug
            Reporter: Ted Yu


0.98 was used.
This was sequence of events:

create 'tablethree_mod'
snapshot 'tablethree_mod', 'snapshot_tablethree_mod'
disable 'tablethree_mod'
restore_snapshot 'snapshot_tablethree_mod'
enable 'tablethree_mod'
delete_snapshot 'snapshot_tablethree_mod'
disable 'tablethree_mod'
drop 'tablethree_mod'
create 'tablethree_mod'

For the last table creation request:
{code} 
2014-01-15 10:03:52,999|beaver.component.hbase|INFO| 'create 'tablethree_mod',
{NAME => 'f1', VERSIONS => 3}

,
{NAME => 'f2', VERSIONS => 3}

,
{NAME => 'f3', VERSIONS => 3}

'
2014-01-15 10:03:52,999|beaver.component.hbase|INFO| 'exists 'tablethree_mod''
2014-01-15 10:03:52,999|beaver.component.hbase|INFO| 'put 'tablethree_mod', '0', 'f1:q1',
'value-0', 10'
2014-01-15 10:03:52,999|beaver.component.hbase|INFO| 'put 'tablethree_mod', '1', 'f1:q1',
'value-1', 20'
2014-01-15 10:03:53,000|beaver.component.hbase|INFO| 'put 'tablethree_mod', '2', 'f2:q2',
'value-2', 30'
2014-01-15 10:03:53,000|beaver.component.hbase|INFO| 'put 'tablethree_mod', '3', 'f3:q3',
'value-3', 40'
2014-01-15 10:03:53,000|beaver.component.hbase|INFO| 'put 'tablethree_mod', '4', 'f3:q3',
'value-4', 50'
2014-01-15 10:03:53,000|beaver.component.hbase|INFO|Done writing commands to file. Will execute
them now.
2014-01-15 10:03:53,000|beaver.machine|INFO|RUNNING: /usr/lib/hbase/bin/hbase shell /grid/0/tmp/hwqe/artifacts/tmp-471142
2014-01-15 10:03:55,878|beaver.machine|INFO|2014-01-15 10:03:55,878 INFO [main] Configuration.deprecation:
hadoop.native.lib is deprecated. Instead, use io.native.lib.available
2014-01-15 10:03:57,283|beaver.machine|INFO|2014-01-15 10:03:57,283 WARN [main] conf.Configuration:
hbase-site.xml:an attempt to override final parameter: dfs.support.append; Ignoring.
2014-01-15 10:03:57,669|beaver.machine|INFO|2014-01-15 10:03:57,669 WARN [main] conf.Configuration:
hbase-site.xml:an attempt to override final parameter: dfs.support.append; Ignoring.
2014-01-15 10:03:57,720|beaver.machine|INFO|2014-01-15 10:03:57,720 WARN [main] conf.Configuration:
hbase-site.xml:an attempt to override final parameter: dfs.support.append; Ignoring.
2014-01-15 10:03:57,997|beaver.machine|INFO|
2014-01-15 10:03:57,997|beaver.machine|INFO|ERROR: Table already exists: tablethree_mod!
2014-01-15 10:03:57,997|beaver.machine|INFO|
{code}
This was an intermittent issue after using Snapshots, a table is not properly dropped / and
not able to properly re-create with the same name. And a HRegion is empty or null Error occurs.
(When you try to drop the table it says it does not exist, and when you try to create the
table it says that it does already exist).
{code}
2014-01-15 10:04:02,462|beaver.machine|INFO|ERROR: HRegionInfo was null or empty in hbase:meta,
row=keyvalues=
{tablethree_mod,,1389778226606.afc82d1ceabbaca36a504b83b65fc0c9./info:seqnumDuringOpen/1389778905355/Put/vlen=8/mvcc=0,
tablethree_mod,,1389778226606.afc82d1ceabbaca36a504b83b65fc0c9./info:server/1389778905355/Put/vlen=32/mvcc=0,
tablethree_mod,,1389778226606.afc82d1ceabbaca36a504b83b65fc0c9./info:serverstartcode/1389778905355/Put/vlen=8/mvcc=0}

{code}
Thanks to Huned who discovered this issue.



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