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From "mostolog@gmail.com" <mosto...@gmail.com>
Subject erratic node networking issues ?
Date Fri, 14 Jul 2017 11:51:13 GMT
Hi

One of our ensemble nodes is showing an erratic behavior:

    Jul 13 20:16:00 host12 zookeeper[26293]: [2017-07-13 20:16:00,500]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:16:00 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:421)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:486)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:465)
    Jul 13 20:16:00 host12 zookeeper[26293]: #011at
    java.lang.Thread.run(Thread.java:748)
    Jul 13 20:17:00 host12 zookeeper[26293]: [2017-07-13 20:17:00,513]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:17:00 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:421)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:486)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:465)
    Jul 13 20:17:00 host12 zookeeper[26293]: #011at
    java.lang.Thread.run(Thread.java:748)
    Jul 13 20:17:26 host12 zookeeper[26293]: [2017-07-13 20:17:26,649]
    WARN Connection broken for id 12, my id = 11, error = 
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:17:26 host12 zookeeper[26293]: java.net.SocketException:
    Connection timed out (Read failed)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.net.SocketInputStream.socketRead0(Native Method)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.net.SocketInputStream.read(SocketInputStream.java:171)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.net.SocketInputStream.read(SocketInputStream.java:141)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.net.SocketInputStream.read(SocketInputStream.java:224)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.io.DataInputStream.readInt(DataInputStream.java:387)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager$RecvWorker.run(QuorumCnxManager.java:904)
    Jul 13 20:17:26 host12 zookeeper[26293]: [2017-07-13 20:17:26,649]
    WARN Interrupting SendWorker
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:17:26 host12 zookeeper[26293]: [2017-07-13 20:17:26,650]
    WARN Interrupted while waiting for message on queue
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:17:26 host12 zookeeper[26293]: java.lang.InterruptedException
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:2014)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2088)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    java.util.concurrent.ArrayBlockingQueue.poll(ArrayBlockingQueue.java:418)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.pollSendQueue(QuorumCnxManager.java:986)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.access$500(QuorumCnxManager.java:65)
    Jul 13 20:17:26 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager$SendWorker.run(QuorumCnxManager.java:824)
    Jul 13 20:17:26 host12 zookeeper[26293]: [2017-07-13 20:17:26,654]
    WARN Send worker leaving thread  id 12 my id = 11
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:18:00 host12 zookeeper[26293]: [2017-07-13 20:18:00,501]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:18:00 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:421)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:486)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:465)
    Jul 13 20:18:00 host12 zookeeper[26293]: #011at
    java.lang.Thread.run(Thread.java:748)
    Jul 13 20:18:05 host12 zookeeper[26293]: [2017-07-13 20:18:05,540]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:18:05 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.toSend(QuorumCnxManager.java:421)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.process(FastLeaderElection.java:486)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection$Messenger$WorkerSender.run(FastLeaderElection.java:465)
    Jul 13 20:18:05 host12 zookeeper[26293]: #011at
    java.lang.Thread.run(Thread.java:748)
    Jul 13 20:19:10 host12 zookeeper[26293]: [2017-07-13 20:19:10,548]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:19:10 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:19:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:19:15 host12 zookeeper[26293]: [2017-07-13 20:19:15,554]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:19:15 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:19:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:20:20 host12 zookeeper[26293]: [2017-07-13 20:20:20,561]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:20:20 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:20:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:20:25 host12 zookeeper[26293]: [2017-07-13 20:20:25,565]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:20:25 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:20:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:21:30 host12 zookeeper[26293]: [2017-07-13 20:21:30,569]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:21:30 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:21:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:21:35 host12 zookeeper[26293]: [2017-07-13 20:21:35,572]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:21:35 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:21:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:22:40 host12 zookeeper[26293]: [2017-07-13 20:22:40,575]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:22:40 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:22:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:22:45 host12 zookeeper[26293]: [2017-07-13 20:22:45,584]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:22:45 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:22:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:23:50 host12 zookeeper[26293]: [2017-07-13 20:23:50,591]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:23:50 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:23:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:23:55 host12 zookeeper[26293]: [2017-07-13 20:23:55,596]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:23:55 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:23:55 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:25:00 host12 zookeeper[26293]: [2017-07-13 20:25:00,600]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:25:00 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:25:00 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:25:05 host12 zookeeper[26293]: [2017-07-13 20:25:05,604]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:25:05 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:25:05 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:26:10 host12 zookeeper[26293]: [2017-07-13 20:26:10,612]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:26:10 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:26:10 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:26:15 host12 zookeeper[26293]: [2017-07-13 20:26:15,625]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:26:15 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:26:15 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:27:20 host12 zookeeper[26293]: [2017-07-13 20:27:20,632]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:27:20 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:27:20 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:27:25 host12 zookeeper[26293]: [2017-07-13 20:27:25,635]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:27:25 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:27:25 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:28:30 host12 zookeeper[26293]: [2017-07-13 20:28:30,640]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:28:30 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:28:30 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:28:35 host12 zookeeper[26293]: [2017-07-13 20:28:35,645]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:28:35 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:28:35 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:29:40 host12 zookeeper[26293]: [2017-07-13 20:29:40,649]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:29:40 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:29:40 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:29:45 host12 zookeeper[26293]: [2017-07-13 20:29:45,652]
    WARN Cannot open channel to 13 at election address /10.0.0.13:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:29:45 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:29:45 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:30:50 host12 zookeeper[26293]: [2017-07-13 20:30:50,657]
    WARN Cannot open channel to 12 at election address /10.0.0.12:3888
    (org.apache.zookeeper.server.quorum.QuorumCnxManager)
    Jul 13 20:30:50 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:443)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectOne(QuorumCnxManager.java:486)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumCnxManager.connectAll(QuorumCnxManager.java:514)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.FastLeaderElection.lookForLeader(FastLeaderElection.java:919)
    Jul 13 20:30:50 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1109)
    Jul 13 20:30:54 host12 zookeeper[26293]: [2017-07-13 20:30:54,880]
    WARN Unexpected exception, tries=0, remaining init limit=6000,
    connecting to /10.0.0.12:2888
    (org.apache.zookeeper.server.quorum.Learner)
    Jul 13 20:30:54 host12 zookeeper[26293]:
    java.net.SocketTimeoutException: connect timed out
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    java.net.PlainSocketImpl.socketConnect(Native Method)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    java.net.Socket.connect(Socket.java:589)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.Learner.sockConnect(Learner.java:227)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.Learner.connectToLeader(Learner.java:256)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:76)
    Jul 13 20:30:54 host12 zookeeper[26293]: #011at
    org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1133)
    Jul 13 21:00:00 host12 zookeeper[26293]: [2017-07-13 21:00:00,522]
    WARN Got zxid 0x200007d99 expected 0x1
    (org.apache.zookeeper.server.quorum.Learner)
    Jul 14 05:50:05 host12 zookeeper[26293]: [2017-07-14 05:50:05,509]
    WARN Unable to read additional data from client sessionid
    0xc00bee319ed0001, likely client has closed socket
    (org.apache.zookeeper.server.NIOServerCnxn)

As we are using docker, I was wondering if theres someone else having 
the same issues, or if there's a timeout setting (or anything else) we 
could set to improve our zookeeper ensemble stability.

Thanks



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