hbase-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "HBase Review Board (JIRA)" <j...@apache.org>
Subject [jira] Commented: (HBASE-2797) Another NPE in ReadWriteConsistencyControl
Date Wed, 07 Jul 2010 22:55:51 GMT

    [ https://issues.apache.org/jira/browse/HBASE-2797?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12886142#action_12886142
] 

HBase Review Board commented on HBASE-2797:
-------------------------------------------

Message from: "Ryan Rawson" <ryanobjc@gmail.com>

-----------------------------------------------------------
This is an automatically generated e-mail. To reply, visit:
http://review.hbase.org/r/241/
-----------------------------------------------------------

(Updated 2010-07-07 15:49:39.980588)


Review request for hbase.


Summary
-------

HBASE-2797 another NPE in ReadWriteConsistencyControl


This addresses bug HBASE-2797.
    http://issues.apache.org/jira/browse/HBASE-2797


Diffs
-----

  src/java/org/apache/hadoop/hbase/regionserver/StoreScanner.java 737d6af 
  src/test/org/apache/hadoop/hbase/regionserver/TestStoreScanner.java 1a89d65 

Diff: http://review.hbase.org/r/241/diff


Testing
-------


Thanks,

Ryan




> Another NPE in ReadWriteConsistencyControl
> ------------------------------------------
>
>                 Key: HBASE-2797
>                 URL: https://issues.apache.org/jira/browse/HBASE-2797
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 0.20.5
>            Reporter: Dave Latham
>            Assignee: ryan rawson
>            Priority: Blocker
>             Fix For: 0.20.6
>
>         Attachments: testDebugNPE.diff
>
>
> This occurred on a cluster with 46 slaves, running a couple MR jobs.  One doing heavy
writes copying everything from one table to a new table with a different schema.  After one
regionserver went down, about 40 of them died within an hour before it was caught and the
jobs stopped.  Let me know if any other piece of context would be particularly helpful.
> This exception appears in the .out file:
> Exception in thread "regionserver/192.168.41.2:60020" 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:320)
>         at org.apache.hadoop.hbase.regionserver.StoreScanner.checkReseek(StoreScanner.java:306)
>         at org.apache.hadoop.hbase.regionserver.StoreScanner.peek(StoreScanner.java:143)
>         at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:127)
>         at org.apache.hadoop.hbase.regionserver.KeyValueHeap$KVScannerComparator.compare(KeyValueHeap.java:117)
>         at java.util.PriorityQueue.siftDownUsingComparator(PriorityQueue.java:644)
>         at java.util.PriorityQueue.siftDown(PriorityQueue.java:612)
>         at java.util.PriorityQueue.poll(PriorityQueue.java:523)
>         at org.apache.hadoop.hbase.regionserver.KeyValueHeap.close(KeyValueHeap.java:151)
>         at org.apache.hadoop.hbase.regionserver.HRegion$RegionScanner.close(HRegion.java:1971)
>         at org.apache.hadoop.hbase.regionserver.HRegionServer.closeAllRegions(HRegionServer.java:1610)
>         at org.apache.hadoop.hbase.regionserver.HRegionServer.run(HRegionServer.java:621)
>         at java.lang.Thread.run(Thread.java:619)

-- 
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.


Mime
View raw message