We have a cluster which is showing signs of instability. The Primary Node
and Coordinator are reassigned to different nodes every several minutes. I
believe this is due to lack of heartbeat or other coordination. The
following error occurs periodically in the nifi-app.log
ERROR [CommitProcessor:1] o.apache.zookeeper.server.NIOServerCnxn
Unexpected Exception:
java.nio.channels.CancelledKeyException: null
at sun.nio.ch.SelectionKeyImpl.ensureValid(SectionKeyImpl.java:73)
at sun.nio.ch.SelectionKeyImpl.interestOps(SelctionKeyImpl.java:77)
at
org.apache.zookeeper.server.NIOServerCnxn.sendBuffer(NIOServerCnxn.java:151)
at
org.apache.zookeeper.server.NIOServerCnXn.sendResopnse(NIOServerCnxn.java:1081)
at
org.apache.zookeeper.server.FinalRequestProcessor.processRequest(FinalRequestProcessor.java:404)
at
org.apache.zookeeper.server.quorum.CommitProcessor.run(CommitProcessor.java:74)
Apache NiFi 1.2.0
Thoughts?
