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https://issues.apache.org/jira/browse/ZOOKEEPER-1237?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14055547#comment-14055547
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adroit commented on ZOOKEEPER-1237:
-----------------------------------
I am using 3.4.6 and we have same issue.
ERROR [CommitProcessor:1:NIOServerCnxn@178] - Unexpected Exception:
java.nio.channels.CancelledKeyException
at sun.nio.ch.SelectionKeyImpl.ensureValid(Unknown Source)
at sun.nio.ch.SelectionKeyImpl.interestOps(Unknown Source)
at
org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:151)
at
org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1081)
at
org.apache.zookeeper.server.NIOServerCnxn.process(NIOServerCnxn.java:1118)
at
org.apache.zookeeper.server.WatchManager.triggerWatch(WatchManager.java:120)
at
org.apache.zookeeper.server.WatchManager.triggerWatch(WatchManager.java:92)
at org.apache.zookeeper.server.DataTree.deleteNode(DataTree.java:591)
at org.apache.zookeeper.server.DataTree.processTxn(DataTree.java:802)
at
org.apache.zookeeper.server.ZKDatabase.processTxn(ZKDatabase.java:329)
at
org.apache.zookeeper.server.ZooKeeperServer.processTxn(ZooKeeperServer.java:994)
at
org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:116)
at
org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:74)
> ERRORs being logged when queued responses are sent after socket has closed.
> ---------------------------------------------------------------------------
>
> Key: ZOOKEEPER-1237
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-1237
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.3.4, 3.4.0, 3.5.0
> Reporter: Patrick Hunt
> Fix For: 3.5.0
>
> Attachments: zookeeper-3.4.5-ZK1237.patch
>
>
> After applying ZOOKEEPER-1049 to 3.3.3 (I believe the same problem exists in
> 3.4/3.5 but haven't tested this) I'm seeing the following exception more
> frequently:
> {noformat}
> Oct 19, 1:31:53 PM ERROR
> 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:418)
> at
> org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1509)
> at
> org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:367)
> at
> org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:73)
> {noformat}
> This is a long standing problem where we try to send a response after the
> socket has been closed. Prior to ZOOKEEPER-1049 this issues happened much
> less frequently (2 sec linger), but I believe it was possible. The timing
> window is just wider now.
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