[HBASE-10349] Table became unusable when master balanced its region after table was dropped - ASF JIRA

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Details

Type: Bug
Status: Closed
Priority: Major
Resolution: Fixed
Affects Version/s: 0.98.0
Fix Version/s: 0.98.0, 0.96.2, 0.99.0
Component/s: None
Labels:
None

Hadoop Flags:

Reviewed

Description

0.98 was used.
This was sequence of events:

create 'tablethree_mod'
snapshot 'tablethree_mod', 'snapshot_tablethree_mod'
disable 'tablethree_mod'
2014-01-15 09:34:51,749 restore_snapshot 'snapshot_tablethree_mod'
2014-01-15 09:35:07,210 enable 'tablethree_mod'
2014-01-15 09:35:46,134 delete_snapshot 'snapshot_tablethree_mod'
2014-01-15 09:41:42,210 disable 'tablethree_mod'
2014-01-15 09:41:43,610 drop 'tablethree_mod'
create 'tablethree_mod'

For the last table creation request:

 
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|

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).

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}

Thanks to Huned who discovered this issue.