Ephemeral nodes remains in one of ensemble after deliberate SIGKILL
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Key: ZOOKEEPER-919
URL: https://issues.apache.org/jira/browse/ZOOKEEPER-919
Project: Zookeeper
Issue Type: Bug
Components: server
Affects Versions: 3.3.1
Environment: Linux CentOS 5.3 64bit, JDK 1.6.0-22
Reporter: Chang Song
I was testing stability of Zookeeper ensemble for production deployment. Three
node ensemble cluster configuration.
In a loop, I kill/restart three Zookeeper clients that created one ephemeral
node each, and at the same time,
I killed Java process on one of ensemble (dont' know if it was a leader or
not). Then I restarted Zookeeper on the server,
It turns out that on two zookeeper ensemble servers, all the ephemeral nodes
are gone (it should), but on the newly started
Zookeeper server, the two old ephemeral nodes stayed. The zookeeper didn't
restart in standalone mode since new ephemeral
nodes gets created on all ensemble servers.
I captured the log.
2010-11-04 17:48:50,201 - INFO
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:17288:nioservercnxn$fact...@250] -
Accepted socket connection from /10.25.131.21:11191
2010-11-04 17:48:50,202 - INFO
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:17288:nioserverc...@776] - Client
attempting to establish new session at /10.25.131.21:11191
2010-11-04 17:48:50,203 - INFO [CommitProcessor:1:nioserverc...@1579] -
Established session 0x12c160c31fc000b with negotiated timeout 30000 for client
/10.25.131.21:11191
2010-11-04 17:48:50,206 - WARN
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:17288:nioserverc...@633] -
EndOfStreamException: Unable to read additional data from client sessionid
0x12c160c31fc000b, likely client has closed socket
2010-11-04 17:48:50,207 - INFO
[NIOServerCxn.Factory:0.0.0.0/0.0.0.0:17288:nioserverc...@1434] - Closed socket
connection for client /10.25.131.21:11191 which had sessionid 0x12c160c31fc000b
2010-11-04 17:48:50,207 - ERROR [CommitProcessor:1:nioserverc...@444] -
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:417)
at
org.apache.zookeeper.server.NIOServerCnxn.sendResponse(NIOServerCnxn.java:1508)
at
org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:367)
at
org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:73)
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