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Posted to issues@hbase.apache.org by "Dave Latham (JIRA)" <ji...@apache.org> on 2010/06/17 01:59:23 UTC
[jira] Created: (HBASE-2740) NPE in ReadWriteConsistencyControl
NPE in ReadWriteConsistencyControl
----------------------------------
Key: HBASE-2740
URL: https://issues.apache.org/jira/browse/HBASE-2740
Project: HBase
Issue Type: Bug
Reporter: Dave Latham
Priority: Critical
Fix For: 0.20.6
A region server running 0.20.5rc3 died with this exception:
2010-06-16 12:19:03,694 FATAL org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog required. Forcing server shutdown
org.apache.hadoop.hbase.DroppedSnapshotException: region: xxxxxxxxxx,1272579746382
at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1041)
at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:896)
at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:262)
at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
Caused by: java.lang.NullPointerException
at org.apache.hadoop.hbase.regionserver.ReadWriteConsistencyControl.getThreadReadPoint(ReadWriteConsistencyControl.java:40)
at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.getNext(MemStore.java:532)
at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.seek(MemStore.java:558)
at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:311)
at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:297)
at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:283)
at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:621)
at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:607)
at org.apache.hadoop.hbase.regionserver.Store.access$200(Store.java:88)
at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:1605)
at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1019)
... 3 more
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[jira] Updated: (HBASE-2740) NPE in ReadWriteConsistencyControl
Posted by "ryan rawson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ryan rawson updated HBASE-2740:
-------------------------------
Attachment: HBASE-2740.txt
a fix and a test for said fix
> NPE in ReadWriteConsistencyControl
> ----------------------------------
>
> Key: HBASE-2740
> URL: https://issues.apache.org/jira/browse/HBASE-2740
> Project: HBase
> Issue Type: Bug
> Reporter: Dave Latham
> Assignee: ryan rawson
> Priority: Critical
> Fix For: 0.20.6
>
> Attachments: HBASE-2740.txt
>
>
> A region server running 0.20.5rc3 died with this exception:
> 2010-06-16 12:19:03,694 FATAL org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: xxxxxxxxxx,1272579746382
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1041)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:896)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:262)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hbase.regionserver.ReadWriteConsistencyControl.getThreadReadPoint(ReadWriteConsistencyControl.java:40)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.getNext(MemStore.java:532)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.seek(MemStore.java:558)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:311)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:297)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:283)
> at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:621)
> at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:607)
> at org.apache.hadoop.hbase.regionserver.Store.access$200(Store.java:88)
> at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:1605)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1019)
> ... 3 more
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[jira] Assigned: (HBASE-2740) NPE in ReadWriteConsistencyControl
Posted by "ryan rawson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ryan rawson reassigned HBASE-2740:
----------------------------------
Assignee: ryan rawson
> NPE in ReadWriteConsistencyControl
> ----------------------------------
>
> Key: HBASE-2740
> URL: https://issues.apache.org/jira/browse/HBASE-2740
> Project: HBase
> Issue Type: Bug
> Reporter: Dave Latham
> Assignee: ryan rawson
> Priority: Critical
> Fix For: 0.20.6
>
>
> A region server running 0.20.5rc3 died with this exception:
> 2010-06-16 12:19:03,694 FATAL org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: xxxxxxxxxx,1272579746382
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1041)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:896)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:262)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hbase.regionserver.ReadWriteConsistencyControl.getThreadReadPoint(ReadWriteConsistencyControl.java:40)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.getNext(MemStore.java:532)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.seek(MemStore.java:558)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:311)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:297)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:283)
> at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:621)
> at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:607)
> at org.apache.hadoop.hbase.regionserver.Store.access$200(Store.java:88)
> at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:1605)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1019)
> ... 3 more
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[jira] Commented: (HBASE-2740) NPE in ReadWriteConsistencyControl
Posted by "ryan rawson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12879588#action_12879588 ]
ryan rawson commented on HBASE-2740:
------------------------------------
this is because we are calling updateReaders() on a Scanner that was already 'reset'. The updateReaders should guard against this condition.
> NPE in ReadWriteConsistencyControl
> ----------------------------------
>
> Key: HBASE-2740
> URL: https://issues.apache.org/jira/browse/HBASE-2740
> Project: HBase
> Issue Type: Bug
> Reporter: Dave Latham
> Assignee: ryan rawson
> Priority: Critical
> Fix For: 0.20.6
>
>
> A region server running 0.20.5rc3 died with this exception:
> 2010-06-16 12:19:03,694 FATAL org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: xxxxxxxxxx,1272579746382
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1041)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:896)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:262)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hbase.regionserver.ReadWriteConsistencyControl.getThreadReadPoint(ReadWriteConsistencyControl.java:40)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.getNext(MemStore.java:532)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.seek(MemStore.java:558)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:311)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:297)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:283)
> at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:621)
> at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:607)
> at org.apache.hadoop.hbase.regionserver.Store.access$200(Store.java:88)
> at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:1605)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1019)
> ... 3 more
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[jira] Resolved: (HBASE-2740) NPE in ReadWriteConsistencyControl
Posted by "ryan rawson (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ryan rawson resolved HBASE-2740.
--------------------------------
Resolution: Fixed
> NPE in ReadWriteConsistencyControl
> ----------------------------------
>
> Key: HBASE-2740
> URL: https://issues.apache.org/jira/browse/HBASE-2740
> Project: HBase
> Issue Type: Bug
> Reporter: Dave Latham
> Assignee: ryan rawson
> Priority: Blocker
> Fix For: 0.20.5
>
> Attachments: HBASE-2740.txt
>
>
> A region server running 0.20.5rc3 died with this exception:
> 2010-06-16 12:19:03,694 FATAL org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: xxxxxxxxxx,1272579746382
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1041)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:896)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:262)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hbase.regionserver.ReadWriteConsistencyControl.getThreadReadPoint(ReadWriteConsistencyControl.java:40)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.getNext(MemStore.java:532)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.seek(MemStore.java:558)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:311)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:297)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:283)
> at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:621)
> at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:607)
> at org.apache.hadoop.hbase.regionserver.Store.access$200(Store.java:88)
> at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:1605)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1019)
> ... 3 more
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[jira] Updated: (HBASE-2740) NPE in ReadWriteConsistencyControl
Posted by "Dave Latham (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HBASE-2740?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Dave Latham updated HBASE-2740:
-------------------------------
Fix Version/s: 0.20.5
(was: 0.20.6)
Priority: Blocker (was: Critical)
> NPE in ReadWriteConsistencyControl
> ----------------------------------
>
> Key: HBASE-2740
> URL: https://issues.apache.org/jira/browse/HBASE-2740
> Project: HBase
> Issue Type: Bug
> Reporter: Dave Latham
> Assignee: ryan rawson
> Priority: Blocker
> Fix For: 0.20.5
>
> Attachments: HBASE-2740.txt
>
>
> A region server running 0.20.5rc3 died with this exception:
> 2010-06-16 12:19:03,694 FATAL org.apache.hadoop.hbase.regionserver.MemStoreFlusher: Replay of hlog required. Forcing server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region: xxxxxxxxxx,1272579746382
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1041)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:896)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:262)
> at org.apache.hadoop.hbase.regionserver.MemStoreFlusher.run(MemStoreFlusher.java:149)
> Caused by: java.lang.NullPointerException
> at org.apache.hadoop.hbase.regionserver.ReadWriteConsistencyControl.getThreadReadPoint(ReadWriteConsistencyControl.java:40)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.getNext(MemStore.java:532)
> at org.apache.hadoop.hbase.regionserver.MemStore$MemStoreScanner.seek(MemStore.java:558)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.reseek(StoreScanner.java:311)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:297)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
> at org.apache.hadoop.hbase.regionserver.StoreScanner.updateReaders(StoreScanner.java:283)
> at org.apache.hadoop.hbase.regionserver.Store.notifyChangedReadersObservers(Store.java:621)
> at org.apache.hadoop.hbase.regionserver.Store.updateStorefiles(Store.java:607)
> at org.apache.hadoop.hbase.regionserver.Store.access$200(Store.java:88)
> at org.apache.hadoop.hbase.regionserver.Store$StoreFlusherImpl.commit(Store.java:1605)
> at org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1019)
> ... 3 more
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