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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