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From "ASF GitHub Bot (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ZOOKEEPER-2044) CancelledKeyException in zookeeper 3.4.5
Date Wed, 25 Jan 2017 06:41:27 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15837278#comment-15837278
] 

ASF GitHub Bot commented on ZOOKEEPER-2044:
-------------------------------------------

Github user rakeshadr commented on a diff in the pull request:

    https://github.com/apache/zookeeper/pull/156#discussion_r97716986
  
    --- Diff: src/java/test/org/apache/zookeeper/server/NIOServerCnxnTest.java ---
    @@ -68,4 +74,38 @@ public void testOperationsAfterCnxnClose() throws IOException,
                 zk.close();
             }
         }
    +
    +    /**
    +     * Mock extension of NIOServerCnxn to test for
    +     * CancelledKeyException (ZOOKEEPER-2044).
    +     */
    +    class MockNIOServerCnxn extends NIOServerCnxn {
    --- End diff --
    
    Please make MockNIOServerCnxn class ''private static''


> CancelledKeyException in zookeeper 3.4.5
> ----------------------------------------
>
>                 Key: ZOOKEEPER-2044
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2044
>             Project: ZooKeeper
>          Issue Type: Bug
>          Components: server
>    Affects Versions: 3.4.6
>         Environment: Red Hat Enterprise Linux Server release 6.2
>            Reporter: shamjith antholi
>            Assignee: Flavio Junqueira
>            Priority: Minor
>             Fix For: 3.4.10, 3.5.3, 3.6.0
>
>         Attachments: ZOOKEEPER-2044.patch, ZOOKEEPER-2044.patch
>
>
> I am getting cancelled key exception in zookeeper (version 3.4.5). Please see the log
below. When this error is thrown, the connected solr shard is going down by giving the error
"Failed to index metadata in Solr,StackTrace=SolrError: HTTP status 503.Reason: {"responseHeader":{"status":503,"QTime":204},"error":{"msg":"ClusterState
says we are the leader, but locally we don't think so","code":503"  and ultimately the current
activity is going down. Could you please give a solution for this ?
> Zookeper log 
> ----------------------------------------------------------
> 2014-09-16 02:58:47,799 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:ZooKeeperServer@832]
- Client attempting to renew session 0x24868e7ca980003 at /172.22.0.5:58587
> 2014-09-16 02:58:47,800 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:Learner@107]
- Revalidating client: 0x24868e7ca980003
> 2014-09-16 02:58:47,802 [myid:1] - INFO  [QuorumPeer[myid=1]/0:0:0:0:0:0:0:0:2181:ZooKeeperServer@588]
- Invalid session 0x24868e7ca980003 for client /172.22.0.5:58587, probably expired
> 2014-09-16 02:58:47,803 [myid:1] - INFO  [NIOServerCxn.Factory:0.0.0.0/0.0.0.0:2181:NIOServerCnxn@1001]
- Closed socket connection for client /172.22.0.5:58587 which had sessionid 0x24868e7ca980003
> 2014-09-16 02:58:47,810 [myid:1] - ERROR [CommitProcessor:1:NIOServerCnxn@180] - Unexpected
Exception:
> java.nio.channels.CancelledKeyException
>         at sun.nio.ch.SelectionKeyImpl.ensureValid(SelectionKeyImpl.java:55)
>         at sun.nio.ch.SelectionKeyImpl.interestOps(SelectionKeyImpl.java:59)
>         at org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:153)
>         at org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1076)
>         at org.apache.zookeeper.server.NIOServerCnxn.process(NIOServerCnxn.java:1113)
>         at org.apache.zookeeper.server.DataTree.setWatches(DataTree.java:1327)
>         at org.apache.zookeeper.server.ZKDatabase.setWatches(ZKDatabase.java:384)
>         at org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:304)
>         at org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:74)
>  



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