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From Benjamin Jaton <benjamin.ja...@gmail.com>
Subject Re: Follower never recovers and keeps saying ZooKeeperServer not running
Date Wed, 04 Jul 2018 15:37:22 GMT
Yes - can increasing the ZK node size cause crashes like this?

On Wed, Jul 4, 2018 at 8:11 AM Steph van Schalkwyk <svanschalkwyk@gmail.com>
wrote:

> think default is one m
>
> On Wed, Jul 4, 2018, 10:04 AM Benjamin Jaton <benjamin.jaton@gmail.com>
> wrote:
>
> > Ah interestingly we did increase the znode size to ~ 40m. Think this can
> be
> > linked?
> >
> > On Tue, Jul 3, 2018 at 10:55 PM Steph van Schalkwyk <
> > svanschalkwyk@gmail.com>
> > wrote:
> >
> > > I've seen this bur can't remember what caused it.
> > > What's your zNode size?
> > > steph
> > >
> > > On Tue, Jul 3, 2018, 9:17 PM Benjamin Jaton <benjamin.jaton@gmail.com>
> > > wrote:
> > >
> > > > Hello,
> > > >
> > > > I'm wondering what can cause a ZK follower to check out like this:
> > > >
> > > > 2018-07-03T13:43:28,814 [myid:] - ERROR [LearnerHandler-/
> > > 10.0.0.248:40282
> > > > :LearnerHandler@620] - Unexpected exception causing shutdown while
> > sock
> > > > still open
> > > > java.io.EOFException: null
> > > >         at java.io.DataInputStream.readInt(DataInputStream.java:392)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > >
> org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)
> > > > ~[zookeeper-3.5.0-alpha.jar:3.5.2-alpha-SNAPSHOT-1702518]
> > > >         at
> > > >
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.QuorumPacket.deserialize(QuorumPacket.java:83)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> > org.apache.jute.BinaryInputArchive.readRecord(BinaryInputArchive.java:99)
> > > > ~[zookeeper-3.5.0-alpha.jar:3.5.2-alpha-SNAPSHOT-1702518]
> > > >         at
> > > >
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.LearnerHandler.run(LearnerHandler.java:514)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > > 2018-07-03T13:43:28,814 [myid:] - WARN  [LearnerHandler-/
> > > 10.0.0.248:40282
> > > > :LearnerHandler@635] - ******* GOODBYE /10.0.0.248:40282 ********
> > > > 2018-07-03T13:43:28,814 [myid:] - ERROR [LearnerHandler-/
> > > 10.0.0.237:54408
> > > > :LearnerHandler@620] - Unexpected exception causing shutdown while
> > sock
> > > > still open
> > > > java.io.EOFException: null
> > > >         at java.io.DataInputStream.readInt(DataInputStream.java:392)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > >
> org.apache.jute.BinaryInputArchive.readInt(BinaryInputArchive.java:63)
> > > > ~[zookeeper-3.5.0-alpha.jar:3.5.2-alpha-SNAPSHOT-1702518]
> > > >         at
> > > >
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.QuorumPacket.deserialize(QuorumPacket.java:83)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> > org.apache.jute.BinaryInputArchive.readRecord(BinaryInputArchive.java:99)
> > > > ~[zookeeper-3.5.0-alpha.jar:3.5.2-alpha-SNAPSHOT-1702518]
> > > >         at
> > > >
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.LearnerHandler.run(LearnerHandler.java:514)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > > 2018-07-03T13:43:28,814 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46754
> > > > 2018-07-03T13:43:28,814 [myid:] - WARN  [LearnerHandler-/
> > > 10.0.0.237:54408
> > > > :LearnerHandler@635] - ******* GOODBYE /10.0.0.237:54408 ********
> > > > 2018-07-03T13:43:28,814 [myid:] - INFO
> > > > [ConnnectionExpirer:MBeanRegistry@128] - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Leader,name3=Connections,name4=10.0.0.111,name5=0x200005f37660000]
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33198
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46780
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33268
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [ConnnectionExpirer:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.111:39162 which had sessionid 0x200005f37660000
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46810
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46824
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46826
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Leader@613
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33316
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33548
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Leader@619
> > > > ]
> > > > - Shutdown called
> > > > java.lang.Exception: shutdown Leader! reason: Not sufficient
> followers
> > > > synced, only synced with sids: [ [2] ]
> > > >         at
> > > > org.apache.zookeeper.server.quorum.Leader.shutdown(Leader.java:619)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > org.apache.zookeeper.server.quorum.Leader.lead(Leader.java:590)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1077)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:33198 (no session
> > > > established for client)
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@128
> > > > ]
> > > > - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Leader,name3=Connections,name4=10.0.0.237,name5=0x20000629130001b]
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [WorkerReceiver[myid=2]:FastLeaderElection@688] - Notification: 2
> > > (message
> > > > format version), 3 (n.leader), 0x9000001cb (n.zxid), 0x0 (n.round),
> > > LOOKING
> > > > (n.state), 3 (n.sid), 0x9 (n.peerEPoch), LEADING (my state)300000066
> > > > (n.config version)
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.237:45602 which had
> > > > sessionid
> > > > 0x20000629130001b
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@128
> > > > ]
> > > > - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Leader,name3=Connections,name4=10.0.0.248,name5=0x2000005cf2a0008]
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > > [WorkerReceiver[myid=2]:FastLeaderElection@688] - Notification: 2
> > > (message
> > > > format version), 3 (n.leader), 0x9000001cb (n.zxid), 0x7 (n.round),
> > > LOOKING
> > > > (n.state), 3 (n.sid), 0x9 (n.peerEPoch), LEADING (my state)300000066
> > > > (n.config version)
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:53764 which had
> > > > sessionid
> > > > 0x2000005cf2a0008
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:33268 (no session
> > > > established for client)
> > > > 2018-07-03T13:43:28,816 [myid:] - WARN
> > > > [NIOWorkerThread-20:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@128
> > > > ]
> > > > - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Leader,name3=Connections,name4=10.0.0.248,name5=0x2000005cf2a000a]
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > > [NIOWorkerThread-20:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.237:46826 (no session established for client)
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:53758 which had
> > > > sessionid
> > > > 0x2000005cf2a000a
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > > [LearnerCnxAcceptor-0.0.0.0/0.0.0.0:2888
> :Leader$LearnerCnxAcceptor@373
> > ]
> > > -
> > > > exception while shutting down acceptor: java.net.SocketException:
> > Socket
> > > > closed
> > > > 2018-07-03T13:43:28,816 [myid:] - WARN
> > > > [NIOWorkerThread-20:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@128
> > > > ]
> > > > - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Leader,name3=Connections,name4=10.0.0.248,name5=0x30000209a080002]
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > > [NIOWorkerThread-20:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.237:46810 (no session established for client)
> > > > 2018-07-03T13:43:28,817 [myid:] - WARN
> > > > [NIOWorkerThread-6:NIOServerCnxn@369]
> > > > - Exception causing close of session 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:53760 which had
> > > > sessionid
> > > > 0x30000209a080002
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [NIOWorkerThread-6:NIOServerCnxn@606]
> > > > - Closed socket connection for client /10.0.0.237:46780 (no session
> > > > established for client)
> > > > 2018-07-03T13:43:28,817 [myid:] - WARN
> > > > [NIOWorkerThread-4:NIOServerCnxn@369]
> > > > - Exception causing close of session 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > [SessionTracker:ZooKeeperServer@384
> > > > ]
> > > > - Expiring session 0x300006dbd91000b, timeout of 15000ms exceeded
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):ZooKeeperServer@498
> > > > ]
> > > > - shutting down
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [NIOWorkerThread-4:NIOServerCnxn@606]
> > > > - Closed socket connection for client /10.0.0.248:33548 (no session
> > > > established for client)
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):SessionTrackerImpl@232
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [SessionTracker:QuorumZooKeeperServer@132] - Submitting global
> > > > closeSession
> > > > request for session 0x300006dbd91000b
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):LeaderRequestProcessor@77
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):PrepRequestProcessor@967
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [SessionTracker:SessionTrackerImpl@158] - SessionTrackerImpl exited
> > > loop!
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO  [ProcessThread(sid:2
> > > > cport:-1)::PrepRequestProcessor@154] - PrepRequestProcessor exited
> > loop!
> > > > 2018-07-03T13:43:28,815 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46908
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33786
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:46954
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33992
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47010
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34240
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47084
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47142
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47248
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34532
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47314
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47342
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47384
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34706
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47452
> > > > 2018-07-03T13:43:28,818 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47496
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47512
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34878
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47580
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47620
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35086
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47700
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47748
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47772
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47886
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47894
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47920
> > > > 2018-07-03T13:43:28,819 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:47998
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48018
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48020
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48136
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48138
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48140
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48172
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35898
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48294
> > > > 2018-07-03T13:43:28,820 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48296
> > > > 2018-07-03T13:43:28,817 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):ProposalRequestProcessor@88
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T13:43:28,816 [myid:] - INFO
> > > > [WorkerReceiver[myid=2]:FastLeaderElection@688] - Notification: 2
> > > (message
> > > > format version), 1 (n.leader), 0x9000001cb (n.zxid), 0x7 (n.round),
> > > LOOKING
> > > > (n.state), 1 (n.sid), 0x9 (n.peerEPoch), LEADING (my state)300000066
> > > > (n.config version)
> > > > 2018-07-03T13:43:28,817 [myid:] - WARN
> > > > [NIOWorkerThread-20:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,821 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48298
> > > > 2018-07-03T13:43:28,821 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):CommitProcessor@358
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T13:43:28,821 [myid:] - INFO
> > > > [NIOWorkerThread-20:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.237:46754 (no session established for client)
> > > > 2018-07-03T13:43:28,821 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:48334
> > > > 2018-07-03T13:43:28,821 [myid:] - INFO
> > > > [CommitProcessor:2:CommitProcessor@193] - CommitProcessor exited
> loop!
> > > > 2018-07-03T13:43:28,821 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:36162
> > > > 2018-07-03T13:43:28,821 [myid:] - WARN
> > > > [NIOWorkerThread-20:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,821 [myid:] - WARN
> > > > [NIOWorkerThread-16:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,821 [myid:] - WARN
> > > > [NIOWorkerThread-31:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T13:43:28,821 [myid:] - WARN
> > > > [NIOWorkerThread-11:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > >
> > > > The rest are more failed clients connections attempts and
> > > "ZooKeeperServer
> > > > not running" messages for hours.
> > > >
> > > >
> > > > There was an event before that that could be linked:
> > > >
> > > > 2018-07-03T12:42:27,639 [myid:] - INFO
> > > > [NIOWorkerThread-7:NIOServerCnxn@606]
> > > > - Closed socket connection for client /10.0.0.237:35536 (no session
> > > > established for client)
> > > > 2018-07-03T12:47:28,864 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33256
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:35568
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33544
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:35672
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:33788
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:35756
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34014
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:35840
> > > > 2018-07-03T12:47:28,865 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34244
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:35924
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34466
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:35994
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34730
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36086
> > > > 2018-07-03T12:47:28,866 [myid:] - WARN
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Follower@93
> > > > ]
> > > > - Exception when following the leader
> > > > java.net.SocketException: Broken pipe (Write failed)
> > > >         at java.net.SocketOutputStream.socketWrite0(Native Method)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > > java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:111)
> > > > ~[?:1.8.0_171]
> > > >         at
> > java.net.SocketOutputStream.write(SocketOutputStream.java:155)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > >
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > > java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > >
> > org.apache.zookeeper.server.quorum.Learner.writePacket(Learner.java:141)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > > org.apache.zookeeper.server.quorum.Learner.ping(Learner.java:609)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.Follower.processPacket(Follower.java:116)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.Follower.followLeader(Follower.java:90)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1064)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34944
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36166
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@128
> > > > ]
> > > > - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Follower]
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:34952
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36172
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Follower@198
> > > > ]
> > > > - shutdown called
> > > > java.lang.Exception: shutdown Follower
> > > >         at
> > > >
> org.apache.zookeeper.server.quorum.Follower.shutdown(Follower.java:198)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> org.apache.zookeeper.server.quorum.QuorumPeer.run(QuorumPeer.java:1068)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35178
> > > > 2018-07-03T12:47:28,866 [myid:] - INFO
> > > > [NIOWorkerThread-14:ZooKeeperServer@969] - Client attempting to
> > > establish
> > > > new session at /10.0.0.248:33256
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36262
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35244
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36276
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35396
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36334
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35472
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36368
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35708
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36446
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:35930
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36530
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:36150
> > > > 2018-07-03T12:47:28,867 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:33544 (no session
> > > > established for client)
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36608
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):NIOServerCnxn@606
> > > > ]
> > > > - Closed socket connection for client /10.0.0.248:33256 which had
> > > > sessionid
> > > > 0x200003aa13c0010
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36692
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):LearnerZooKeeperServer@167
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.248:36418
> > > > 2018-07-03T12:47:28,868 [myid:] - ERROR
> > > > [FollowerRequestProcessor:2:ZooKeeperCriticalThread@48] - Severe
> > > > unrecoverable error, from thread : FollowerRequestProcessor:2
> > > > java.net.SocketException: Socket closed
> > > >         at
> > > > java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:118)
> > > > ~[?:1.8.0_171]
> > > >         at
> > java.net.SocketOutputStream.write(SocketOutputStream.java:155)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > >
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:82)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > > java.io.BufferedOutputStream.flush(BufferedOutputStream.java:140)
> > > > ~[?:1.8.0_171]
> > > >         at
> > > >
> > org.apache.zookeeper.server.quorum.Learner.writePacket(Learner.java:141)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > > org.apache.zookeeper.server.quorum.Learner.request(Learner.java:190)
> > > > ~[zookeeper-3.5.0-alpha.jar:?]
> > > >         at
> > > >
> > > >
> > >
> >
> org.apache.zookeeper.server.quorum.FollowerRequestProcessor.run(FollowerRequestProcessor.java:101)
> > > > [zookeeper-3.5.0-alpha.jar:?]
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):ZooKeeperServer@498
> > > > ]
> > > > - shutting down
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):FollowerRequestProcessor@138
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > >
> > >
> >
> [FollowerRequestProcessor:2:ZooKeeperServer$ZooKeeperServerListenerImpl@475
> > > > ]
> > > > - Thread FollowerRequestProcessor:2 exits, error code 1
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):CommitProcessor@358
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T12:47:28,869 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):FinalRequestProcessor@492
> > > > ]
> > > > - shutdown of request processor complete
> > > > 2018-07-03T12:47:28,869 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@128
> > > > ]
> > > > - Unregister MBean
> > > >
> > > >
> > >
> >
> [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=Follower,name3=InMemoryDataTree]
> > > > 2018-07-03T12:47:28,870 [myid:] - INFO
> > > >
> > > >
> > >
> >
> [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):SyncRequestProcessor@191
> > > > ]
> > > > - Shutting down
> > > > 2018-07-03T12:47:28,870 [myid:] - WARN
> > > > [NIOWorkerThread-17:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,870 [myid:] - INFO
> > > > [NIOWorkerThread-17:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.248:34952 (no session established for client)
> > > > 2018-07-03T12:47:28,870 [myid:] - WARN
> > > > [NIOWorkerThread-17:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,870 [myid:] - INFO
> > > > [NIOWorkerThread-17:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.248:34014 (no session established for client)
> > > > 2018-07-03T12:47:28,870 [myid:] - WARN
> > > > [NIOWorkerThread-32:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,868 [myid:] - INFO
> > > > [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181
> > > > :NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection
> > > from
> > > > /
> > > > 10.0.0.237:36766
> > > > 2018-07-03T12:47:28,871 [myid:] - INFO
> > > > [NIOWorkerThread-32:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.248:36150 (no session established for client)
> > > > 2018-07-03T12:47:28,871 [myid:] - WARN
> > > > [NIOWorkerThread-32:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,871 [myid:] - WARN
> > > > [NIOWorkerThread-17:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,871 [myid:] - INFO
> > > > [NIOWorkerThread-32:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.248:33788 (no session established for client)
> > > > 2018-07-03T12:47:28,871 [myid:] - INFO
> > > > [NIOWorkerThread-17:NIOServerCnxn@606] - Closed socket connection
> for
> > > > client /10.0.0.248:35930 (no session established for client)
> > > > 2018-07-03T12:47:28,871 [myid:] - WARN
> > > > [NIOWorkerThread-32:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,871 [myid:] - WARN
> > > > [NIOWorkerThread-17:NIOServerCnxn@369] - Exception causing close of
> > > > session
> > > > 0x0: ZooKeeperServer not running
> > > > 2018-07-03T12:47:28,871 [myid:] - INFO
> > > > [CommitProcessor:2:CommitProcessor@193] - CommitProcessor exited
> loop!
> > > >
> > > > In particular I don't like the sound of this "Severe unrecoverable
> > error,
> > > > from thread : FollowerRequestProcessor" from
> "ZooKeeperCriticalThread".
> > > >
> > > > Is this a fatal event for the whole ZK server?
> > > >
> > > > Thanks
> > > > Benjamin
> > > >
> > >
> >
>

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