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https://issues.apache.org/jira/browse/HBASE-9411?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13759709#comment-13759709
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Hudson commented on HBASE-9411:
-------------------------------
FAILURE: Integrated in HBase-TRUNK-on-Hadoop-2.0.0 #712 (See
[https://builds.apache.org/job/HBase-TRUNK-on-Hadoop-2.0.0/712/])
HBASE-9411 Increment / decrement of rpcCount in RpcServer#Connection is not
protected by synchronization (tedyu: rev 1520438)
*
/hbase/trunk/hbase-server/src/main/java/org/apache/hadoop/hbase/ipc/RpcServer.java
> Increment / decrement of rpcCount in RpcServer#Connection is not protected by
> synchronization
> ---------------------------------------------------------------------------------------------
>
> Key: HBASE-9411
> URL: https://issues.apache.org/jira/browse/HBASE-9411
> Project: HBase
> Issue Type: Bug
> Reporter: Ted Yu
> Assignee: Ted Yu
> Priority: Minor
> Fix For: 0.98.0
>
> Attachments: 9411-v1.txt
>
>
> Here is related code:
> {code}
> /* Decrement the outstanding RPC count */
> protected void decRpcCount() {
> rpcCount--;
> }
> /* Increment the outstanding RPC count */
> protected void incRpcCount() {
> rpcCount++;
> }
> {code}
> Even though rpcCount is volatile, in non atomic operations (increment /
> decrement) different threads may get unexpected result.
> See
> http://stackoverflow.com/questions/7805192/is-a-volatile-int-in-java-thread-safe
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