ERRORs being logged when queued responses are sent after socket has closed.
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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: 3.3.4, 3.4.0, 3.5.0
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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