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Posted to dev@hbase.apache.org by "Enis Soztutar (JIRA)" <ji...@apache.org> on 2013/11/12 02:36:17 UTC
[jira] [Resolved] (HBASE-9952) Snapshot restore may fail due to
NullPointerException
[ https://issues.apache.org/jira/browse/HBASE-9952?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Enis Soztutar resolved HBASE-9952.
----------------------------------
Resolution: Fixed
Hadoop Flags: Reviewed
Committed this. Thanks for looking.
> Snapshot restore may fail due to NullPointerException
> -----------------------------------------------------
>
> Key: HBASE-9952
> URL: https://issues.apache.org/jira/browse/HBASE-9952
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.96.0
> Reporter: Ted Yu
> Assignee: Enis Soztutar
> Fix For: 0.98.0, 0.96.1, 0.94.14
>
> Attachments: hbase-9952_v1.patch
>
>
> In our QA run, certain snapshot restore request seemed to hang.
> The following was found in master log:
> {code}
> 2013-11-11 08:52:43,887 INFO org.apache.hadoop.hbase.util.FSVisitor: No logs under directory:hdfs://qeempress21:8020/apps/hbase/data/.hbase-snapshot/snapshot_tablethree_mod/WALs^M
> 2013-11-11 08:52:43,887 INFO org.apache.hadoop.hbase.master.RegionStates: Transitioned {e048f867bbb31702dc1dd0498db53b82 state=SPLIT, ts=1384159894259, server=QEEMPRESS23,60020,1384146414618} to {e048f867bbb31702dc1dd0498db53b82 state=OFFLINE, ts=1384159963887, server=null}^M
> 2013-11-11 08:52:43,896 INFO org.apache.hadoop.hbase.catalog.MetaEditor: Deleted [{ENCODED => 214a354a9e9f07d3c4e9420d2fdd8d28, NAME => 'tablethree_mod,,1384159891126.214a354a9e9f07d3c4e9420d2fdd8d28.', STARTKEY => '', ENDKEY => '\x5C011'}, {ENCODED => 4dad288061dac82bb420fb6dd526eea5, NAME => 'tablethree_mod,\x5C011,1384159900704.4dad288061dac82bb420fb6dd526eea5.', STARTKEY => '\x5C011', ENDKEY => '\x5C100'}, {ENCODED => e98b84924307f22d4318cfe235445ba7, NAME => 'tablethree_mod,\x5C100,1384159900704.e98b84924307f22d4318cfe235445ba7.', STARTKEY => '\x5C100', ENDKEY => ''}]^M
> 2013-11-11 08:52:43,900 INFO org.apache.hadoop.hbase.catalog.MetaEditor: Added 1^M
> 2013-11-11 08:52:43,913 DEBUG org.apache.hadoop.hbase.zookeeper.lock.ZKInterProcessLockBase: Released /hbase/table-lock/tablethree_mod/write-master:600000000000006^M
> 2013-11-11 08:52:43,913 ERROR org.apache.hadoop.hbase.executor.EventHandler: Caught throwable while processing event C_M_RESTORE_SNAPSHOT^M
> java.lang.NullPointerException^M
> at org.apache.hadoop.hbase.catalog.MetaEditor.deleteRegions(MetaEditor.java:488)^M
> at org.apache.hadoop.hbase.catalog.MetaEditor.overwriteRegions(MetaEditor.java:534)^M
> at org.apache.hadoop.hbase.master.snapshot.RestoreSnapshotHandler.handleTableOperation(RestoreSnapshotHandler.java:160)^M
> at org.apache.hadoop.hbase.master.handler.TableEventHandler.process(TableEventHandler.java:129)^M
> at org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)^M
> at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)^M
> at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)^M
> {code}
> Looks like null was passed in the following call MetaEditor#overwriteRegions():
> {code}
> deleteRegions(catalogTracker, regionInfos);
> {code}
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