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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 04:37:26 GMT

    [ https://issues.apache.org/jira/browse/ZOOKEEPER-2044?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15837183#comment-15837183
] 

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

GitHub user hanm opened a pull request:

    https://github.com/apache/zookeeper/pull/156

    ZOOKEEPER-2044:CancelledKeyException in zookeeper 3.4.5.

    Patch from Germán Blanco, test case from Flavio.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/hanm/zookeeper ZOOKEEPER-2044

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/zookeeper/pull/156.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #156
    
----
commit a220d95f2aefd0bf6f72d2757a87dc5480f9891e
Author: Michael Han <hanm@apache.org>
Date:   2017-01-25T04:35:05Z

    ZOOKEEPER-2044:CancelledKeyException in zookeeper 3.4.5.
    Patch from Germán Blanco, test case from Flavio.

----


> 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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