[
https://issues.apache.org/jira/browse/HBASE-12274?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14191527#comment-14191527
]
Hudson commented on HBASE-12274:
--------------------------------
SUCCESS: Integrated in HBase-0.98 #643 (See
[https://builds.apache.org/job/HBase-0.98/643/])
HBASE-12274 addendum removes synchronized keyword for nextRaw() (tedyu: rev
f1cabd378512f1b18003afed9782d88d022d6850)
* hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
> Race between RegionScannerImpl#nextInternal() and RegionScannerImpl#close()
> may produce null pointer exception
> --------------------------------------------------------------------------------------------------------------
>
> Key: HBASE-12274
> URL: https://issues.apache.org/jira/browse/HBASE-12274
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.6.1
> Reporter: Ted Yu
> Assignee: Ted Yu
> Fix For: 2.0.0, 0.98.8, 0.99.2
>
> Attachments: 12274-0.98.addendum, 12274-region-server.log,
> 12274-v2.txt, 12274-v2.txt, 12274-v3.txt
>
>
> I saw the following in region server log:
> {code}
> 2014-10-15 03:28:36,976 ERROR
> [B.DefaultRpcServer.handler=0,queue=0,port=60020] ipc.RpcServer: Unexpected
> throwable object
> java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextInternal(HRegion.java:5023)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:4932)
> at
> org.apache.hadoop.hbase.regionserver.HRegion$RegionScannerImpl.nextRaw(HRegion.java:4923)
> at
> org.apache.hadoop.hbase.regionserver.HRegionServer.scan(HRegionServer.java:3245)
> at
> org.apache.hadoop.hbase.protobuf.generated.ClientProtos$ClientService$2.callBlockingMethod(ClientProtos.java:29994)
> at org.apache.hadoop.hbase.ipc.RpcServer.call(RpcServer.java:2078)
> at org.apache.hadoop.hbase.ipc.CallRunner.run(CallRunner.java:108)
> at
> org.apache.hadoop.hbase.ipc.RpcExecutor.consumerLoop(RpcExecutor.java:114)
> at org.apache.hadoop.hbase.ipc.RpcExecutor$1.run(RpcExecutor.java:94)
> at java.lang.Thread.run(Thread.java:745)
> {code}
> This is where the NPE happened:
> {code}
> // Let's see what we have in the storeHeap.
> KeyValue current = this.storeHeap.peek();
> {code}
> The cause was race between nextInternal(called through nextRaw) and close
> methods.
> nextRaw() is not synchronized.
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
