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From "Doug Cutting (Resolved) (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (AVRO-982) NettyTransceiver: can hang on connection interruption
Date Fri, 16 Dec 2011 19:38:30 GMT

     [ https://issues.apache.org/jira/browse/AVRO-982?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Doug Cutting resolved AVRO-982.
-------------------------------

       Resolution: Fixed
    Fix Version/s: 1.6.2
         Assignee: Bruno Dumon
     Hadoop Flags: Reviewed

The test looks great.  I used diff's -w flag to remove the spurious whitespace changes.

I committed this.

Thanks, Bruno!
                
> NettyTransceiver: can hang on connection interruption
> -----------------------------------------------------
>
>                 Key: AVRO-982
>                 URL: https://issues.apache.org/jira/browse/AVRO-982
>             Project: Avro
>          Issue Type: Improvement
>          Components: java
>            Reporter: Bruno Dumon
>            Assignee: Bruno Dumon
>            Priority: Minor
>             Fix For: 1.6.2
>
>         Attachments: AVRO-982-testcase.patch, AVRO-982.patch
>
>
> When stopping my avro server, I noticed that my avro client was hanging. This makes it
impossible for my client to retry the operation, as it hangs inside the avro code:
> {noformat}
> "pool-2-thread-1" prio=10 tid=0x00007fc66840e800 nid=0x75fc waiting on condition [0x00007fc674176000]
>    java.lang.Thread.State: WAITING (parking)
>         at sun.misc.Unsafe.park(Native Method)
>         - parking to wait for  <0x00000007d7471bd0> (a java.util.concurrent.CountDownLatch$Sync)
>         at java.util.concurrent.locks.LockSupport.park(LockSupport.java:156)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.parkAndCheckInterrupt(AbstractQueuedSynchronizer.java:811)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.doAcquireSharedInterruptibly(AbstractQueuedSynchronizer.java:969)
>         at java.util.concurrent.locks.AbstractQueuedSynchronizer.acquireSharedInterruptibly(AbstractQueuedSynchronizer.java:1281)
>         at java.util.concurrent.CountDownLatch.await(CountDownLatch.java:207)
>         at org.apache.avro.ipc.CallFuture.get(CallFuture.java:116)
>         at org.apache.avro.ipc.Requestor.request(Requestor.java:106)
>         at org.apache.avro.ipc.specific.SpecificRequestor.invoke(SpecificRequestor.java:72)
> {noformat}
> In a similar situation elsewhere in the NettyTransceiver (method exceptionCaught), the
pending requests are canceled. It seems appropriate to do that also on closed connections.
I'll attach a patch.

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