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  1. ZooKeeper
  2. ZOOKEEPER-1237

ERRORs being logged when queued responses are sent after socket has closed.

    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Duplicate
    • Affects Version/s: 3.3.4, 3.4.0, 3.5.0
    • Fix Version/s: 3.4.10
    • Component/s: server
    • Labels:
      None

      Description

      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:

      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)
      

      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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              • Assignee:
                Unassigned
                Reporter:
                phunt Patrick Hunt
              • Votes:
                16 Vote for this issue
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                Dates

                • Created:
                  Updated:
                  Resolved: