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From Sebastian Mattheis <Sebastian.Matth...@bmw-carit.de>
Subject Zookeeper 3.5.1 dynamic configuration fails with EOFException
Date Fri, 10 Jun 2016 12:18:47 GMT
Zookeeper 3.5.1 (https://github.com/apache/zookeeper/releases/tag/release-3.5.1) dynamic configuration
fails with two servers that are started one after the other throwing an EOFException. This
is the same, if server 2 is configured as observer or participant. Is the usage wrong? Is
this a known bug?

# server.1:

## /opt/zookeeper/var/myid
1

## /opt/zookeeper/conf/zoo.cfg
autopurge.purgeInterval=1
initLimit=10
syncLimit=5
autopurge.snapRetainCount=4
tickTime=2000
dataDir=/opt/zookeeper/var
dataLogDir=/opt/zookeeper/logs
standaloneEnabled=false
dynamicConfigFile=/opt/zookeeper/conf/zoo.cfg.dynamic

## /opt/zookeeper/conf/zoo.cfg.dynamic
server.1=192.168.99.100:2888:3888;2181

## Output (on connection of server.2 after start-up):

…
2016-06-09 09:22:32,309 [myid:1] - INFO  [NIOServerCxnFactory.AcceptThread:/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296]
- Accepted socket connection from /192.168.99.101:43222
2016-06-09 09:22:32,378 [myid:1] - INFO  [NIOWorkerThread-1:ZooKeeperServer@964] - Client
attempting to establish new session at /192.168.99.101:43222
2016-06-09 09:22:32,382 [myid:1] - INFO  [SyncThread:1:FileTxnLog@200] - Creating new log
file: log.100000001
2016-06-09 09:22:32,392 [myid:1] - INFO  [CommitProcWorkThread-1:ZooKeeperServer@678] - Established
session 0x10001af5f770000 with negotiated timeout 30000 for client /192.168.99.101:43222
2016-06-09 09:22:32,410 [myid:1] - WARN  [NIOWorkerThread-1:NIOServerCnxn@365] - Unable to
read additional data from client sessionid 0x10001af5f770000, likely client has closed socket
2016-06-09 09:22:32,411 [myid:1] - INFO  [NIOWorkerThread-1:MBeanRegistry@119] - Unregister
MBean [org.apache.ZooKeeperService:name0=ReplicatedServer_id1,name1=replica.1,name2=Leader,name3=Connections,name4=192.168.99.101,name5=0x10001af5f770000]
2016-06-09 09:22:32,412 [myid:1] - INFO  [NIOWorkerThread-1:NIOServerCnxn@606] - Closed socket
connection for client /192.168.99.101:43222 which had sessionid 0x10001af5f770000
2016-06-09 09:22:33,133 [myid:1] - INFO  [/192.168.99.100:3888:QuorumCnxManager$Listener@637]
- Received connection request /192.168.99.101:44396
2016-06-09 09:22:33,154 [myid:1] - WARN  [RecvWorker:2:QuorumCnxManager$RecvWorker@917] -
Connection broken for id 2, my id = 1, error = 
java.io.EOFException
	at java.io.DataInputStream.readInt(DataInputStream.java:392)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager$RecvWorker.run(QuorumCnxManager.java:902)
2016-06-09 09:22:33,158 [myid:1] - WARN  [RecvWorker:2:QuorumCnxManager$RecvWorker@920] -
Interrupting SendWorker
2016-06-09 09:22:33,159 [myid:1] - WARN  [SendWorker:2:QuorumCnxManager$SendWorker@834] -
Interrupted while waiting for message on queue
java.lang.InterruptedException
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:2014)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2088)
	at java.util.concurrent.ArrayBlockingQueue.poll(ArrayBlockingQueue.java:418)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.pollSendQueue(QuorumCnxManager.java:986)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.access$500(QuorumCnxManager.java:63)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager$SendWorker.run(QuorumCnxManager.java:822)
2016-06-09 09:22:33,164 [myid:1] - WARN  [SendWorker:2:QuorumCnxManager$SendWorker@843] -
Send worker leaving thread  id 2 my id = 1
2016-06-09 09:22:33,348 [myid:1] - INFO  [/192.168.99.100:3888:QuorumCnxManager$Listener@637]
- Received connection request /192.168.99.101:44398
2016-06-09 09:22:33,352 [myid:1] - ERROR [SendWorker:2:QuorumCnxManager$SendWorker@810] -
Failed to send last message. Shutting down thread.
java.net.SocketException: Broken pipe
	at java.net.SocketOutputStream.socketWrite0(Native Method)
	at java.net.SocketOutputStream.socketWrite(SocketOutputStream.java:109)
	at java.net.SocketOutputStream.write(SocketOutputStream.java:132)
	at java.io.DataOutputStream.writeInt(DataOutputStream.java:200)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager$SendWorker.send(QuorumCnxManager.java:779)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager$SendWorker.run(QuorumCnxManager.java:806)
2016-06-09 09:22:33,359 [myid:1] - INFO  [/192.168.99.100:3888:QuorumCnxManager$Listener@637]
- Received connection request /192.168.99.101:44400
2016-06-09 09:22:33,365 [myid:1] - WARN  [SendWorker:2:QuorumCnxManager$SendWorker@843] -
Send worker leaving thread  id 2 my id = 1
2016-06-09 09:22:33,366 [myid:1] - WARN  [RecvWorker:2:QuorumCnxManager$RecvWorker@920] -
Interrupting SendWorker
2016-06-09 09:22:33,413 [myid:1] - INFO  [LearnerHandler-/192.168.99.101:48832:LearnerHandler@385]
- Follower sid: 2 not in the current config 100000000
2016-06-09 09:22:33,425 [myid:1] - INFO  [LearnerHandler-/192.168.99.101:48832:LearnerHandler@683]
- Synchronizing with Follower sid: 2 maxCommittedLog=0x100000001 minCommittedLog=0x100000001
lastProcessedZxid=0x100000001 peerLastZxid=0x0
2016-06-09 09:22:33,427 [myid:1] - WARN  [LearnerHandler-/192.168.99.101:48832:ZKDatabase@310]
- Unable to find proposals from txnlog for zxid: 0
2016-06-09 09:22:33,430 [myid:1] - INFO  [LearnerHandler-/192.168.99.101:48832:LearnerHandler@455]
- Sending snapshot last zxid of peer is 0x0, zxid of leader is 0x100000001, send zxid of db
as 0x100000001, 1 concurrent snapshots, snapshot was exempt from throttle
2016-06-09 09:23:03,908 [myid:1] - INFO  [SessionTracker:ZooKeeperServer@384] - Expiring session
0x10001af5f770000, timeout of 30000ms exceeded
2016-06-09 09:23:03,909 [myid:1] - INFO  [SessionTracker:QuorumZooKeeperServer@132] - Submitting
global closeSession request for session 0x10001af5f770000
2016-06-09 09:23:03,910 [myid:1] - INFO  [ProcessThread(sid:1 cport:-1)::PrepRequestProcessor@649]
- Processed session termination for sessionid: 0x10001af5f770000

# server.2:

## /opt/zookeeper/var/myid
2

## /opt/zookeeper/conf/zoo.cfg

autopurge.purgeInterval=1
initLimit=10
syncLimit=5
autopurge.snapRetainCount=4
tickTime=2000
dataDir=/opt/zookeeper/var
dataLogDir=/opt/zookeeper/logs
standaloneEnabled=false
dynamicConfigFile=/opt/zookeeper/conf/zoo.cfg.dynamic

## /opt/zookeeper/conf/zoo.cfg.dynamic
server.2=192.168.99.101:2888:3888:observer;2181
server.1=192.168.99.100:2888:3888:participant;0.0.0.0:2181

## Output (on start-up):

Using config: /opt/zookeeper/bin/../conf/zoo.cfg
2016-06-09 09:22:32,833 [myid:] - INFO  [main:QuorumPeerConfig@114] - Reading configuration
from: /opt/zookeeper/bin/../conf/zoo.cfg
2016-06-09 09:22:32,847 [myid:] - INFO  [main:QuorumPeerConfig@306] - clientPort is not set
2016-06-09 09:22:32,848 [myid:] - INFO  [main:QuorumPeerConfig@320] - secureClientPort is
not set
2016-06-09 09:22:32,853 [myid:] - WARN  [main:QuorumPeerConfig@555] - No server failure will
be tolerated. You need at least 3 servers.
2016-06-09 09:22:32,863 [myid:2] - INFO  [main:DatadirCleanupManager@78] - autopurge.snapRetainCount
set to 4
2016-06-09 09:22:32,863 [myid:2] - INFO  [main:DatadirCleanupManager@79] - autopurge.purgeInterval
set to 1
2016-06-09 09:22:32,869 [myid:2] - INFO  [PurgeTask:DatadirCleanupManager$PurgeTask@138] -
Purge task started.
2016-06-09 09:22:32,888 [myid:2] - INFO  [main:QuorumPeerMain@136] - Starting quorum peer
2016-06-09 09:22:32,893 [myid:2] - INFO  [PurgeTask:DatadirCleanupManager$PurgeTask@144] -
Purge task completed.
2016-06-09 09:22:32,910 [myid:2] - INFO  [main:NIOServerCnxnFactory@673] - Configuring NIO
connection handler with 10s sessionless connection timeout, 1 selector thread(s), 2 worker
threads, and 64 kB direct buffers.
2016-06-09 09:22:32,916 [myid:2] - INFO  [main:NIOServerCnxnFactory@686] - binding to port
/0.0.0.0:2181
2016-06-09 09:22:32,979 [myid:2] - INFO  [main:Slf4jLog@67] - Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log)
via org.mortbay.log.Slf4jLog
2016-06-09 09:22:33,019 [myid:2] - INFO  [main:QuorumPeer@1280] - Local sessions disabled
2016-06-09 09:22:33,022 [myid:2] - INFO  [main:QuorumPeer@1291] - Local session upgrading
disabled
2016-06-09 09:22:33,023 [myid:2] - INFO  [main:QuorumPeer@1258] - tickTime set to 2000
2016-06-09 09:22:33,023 [myid:2] - INFO  [main:QuorumPeer@1302] - minSessionTimeout set to
4000
2016-06-09 09:22:33,025 [myid:2] - INFO  [main:QuorumPeer@1313] - maxSessionTimeout set to
40000
2016-06-09 09:22:33,026 [myid:2] - INFO  [main:QuorumPeer@1328] - initLimit set to 10
2016-06-09 09:22:33,041 [myid:2] - INFO  [main:QuorumPeer@744] - currentEpoch not found! Creating
with a reasonable default of 0. This should only happen when you are upgrading your installation
2016-06-09 09:22:33,056 [myid:2] - INFO  [main:QuorumPeer@759] - acceptedEpoch not found!
Creating with a reasonable default of 0. This should only happen when you are upgrading your
installation
2016-06-09 09:22:33,061 [myid:2] - INFO  [main:Slf4jLog@67] - jetty-6.1.26
2016-06-09 09:22:33,100 [myid:2] - INFO  [main:Slf4jLog@67] - Started SelectChannelConnector@0.0.0.0:8080
2016-06-09 09:22:33,104 [myid:2] - INFO  [main:JettyAdminServer@105] - Started AdminServer
on address 0.0.0.0, port 8080 and command URL /commands
2016-06-09 09:22:33,112 [myid:2] - INFO  [QuorumPeerListener:QuorumCnxManager$Listener@631]
- My election bind port: /192.168.99.101:3888
2016-06-09 09:22:33,125 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):QuorumPeer@986]
- LOOKING
2016-06-09 09:22:33,127 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):FastLeaderElection@894]
- New election. My id =  2, proposed zxid=0x0
2016-06-09 09:22:33,142 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection@688] -
Notification: 2 (message format version), 2 (n.leader), 0x0 (n.zxid), 0x1 (n.round), LOOKING
(n.state), 2 (n.sid), 0x0 (n.peerEPoch), LOOKING (my state)0 (n.config version)
2016-06-09 09:22:33,150 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@294]
- 2 Received version: 100000000 my version: 0
2016-06-09 09:22:33,156 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@301]
- restarting leader election
2016-06-09 09:22:33,157 [myid:2] - INFO  [/192.168.99.101:3888:QuorumCnxManager$Listener@659]
- Leaving listener
2016-06-09 09:22:33,163 [myid:2] - WARN  [RecvWorker:1:QuorumCnxManager$RecvWorker@917] -
Connection broken for id 1, my id = 2, error = 
java.net.SocketException: Socket closed
	at java.net.SocketInputStream.socketRead0(Native Method)
	at java.net.SocketInputStream.socketRead(SocketInputStream.java:116)
	at java.net.SocketInputStream.read(SocketInputStream.java:170)
	at java.net.SocketInputStream.read(SocketInputStream.java:141)
	at java.net.SocketInputStream.read(SocketInputStream.java:223)
	at java.io.DataInputStream.readInt(DataInputStream.java:387)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager$RecvWorker.run(QuorumCnxManager.java:902)
2016-06-09 09:22:33,166 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection$Messenger$WorkerReceiver@440]
- WorkerReceiver is down
2016-06-09 09:22:33,166 [myid:2] - WARN  [SendWorker:1:QuorumCnxManager$SendWorker@834] -
Interrupted while waiting for message on queue
java.lang.InterruptedException
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.reportInterruptAfterWait(AbstractQueuedSynchronizer.java:2014)
	at java.util.concurrent.locks.AbstractQueuedSynchronizer$ConditionObject.awaitNanos(AbstractQueuedSynchronizer.java:2088)
	at java.util.concurrent.ArrayBlockingQueue.poll(ArrayBlockingQueue.java:418)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.pollSendQueue(QuorumCnxManager.java:986)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager.access$500(QuorumCnxManager.java:63)
	at org.apache.zookeeper.server.quorum.QuorumCnxManager$SendWorker.run(QuorumCnxManager.java:822)
2016-06-09 09:22:33,173 [myid:2] - WARN  [SendWorker:1:QuorumCnxManager$SendWorker@843] -
Send worker leaving thread  id 1 my id = 2
2016-06-09 09:22:33,174 [myid:2] - WARN  [RecvWorker:1:QuorumCnxManager$RecvWorker@920] -
Interrupting SendWorker
2016-06-09 09:22:33,350 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):FastLeaderElection@928]
- Notification time out: 400
2016-06-09 09:22:33,353 [myid:2] - INFO  [WorkerSender[myid=2]:FastLeaderElection$Messenger$WorkerSender@470]
- WorkerSender is down
2016-06-09 09:22:33,354 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@119]
- Unregister MBean [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=LeaderElection]
2016-06-09 09:22:33,355 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):QuorumPeer@986]
- LOOKING
2016-06-09 09:22:33,356 [myid:2] - WARN  [RecvWorker:1:QuorumCnxManager$RecvWorker@920] -
Interrupting SendWorker
2016-06-09 09:22:33,357 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):FastLeaderElection@894]
- New election. My id =  2, proposed zxid=0x0
2016-06-09 09:22:33,359 [myid:2] - INFO  [QuorumPeerListener:QuorumCnxManager$Listener@631]
- My election bind port: /192.168.99.101:3888
2016-06-09 09:22:33,358 [myid:2] - WARN  [SendWorker:1:QuorumCnxManager$SendWorker@843] -
Send worker leaving thread  id 1 my id = 2
2016-06-09 09:22:33,374 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection@688] -
Notification: 2 (message format version), 1 (n.leader), 0x0 (n.zxid), 0x1 (n.round), LEADING
(n.state), 1 (n.sid), 0x1 (n.peerEPoch), LOOKING (my state)100000000 (n.config version)
2016-06-09 09:22:33,376 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):MBeanRegistry@119]
- Unregister MBean [org.apache.ZooKeeperService:name0=ReplicatedServer_id2,name1=replica.2,name2=LeaderElection]
2016-06-09 09:22:33,378 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):QuorumPeer@1062]
- FOLLOWING
2016-06-09 09:22:33,385 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Learner@88]
- TCP NoDelay set to: true
2016-06-09 09:22:33,385 [myid:2] - INFO  [WorkerReceiver[myid=2]:FastLeaderElection@688] -
Notification: 2 (message format version), 1 (n.leader), 0x0 (n.zxid), 0x1 (n.round), LEADING
(n.state), 1 (n.sid), 0x1 (n.peerEPoch), FOLLOWING (my state)100000000 (n.config version)
2016-06-09 09:22:33,394 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:zookeeper.version=3.5.1-alpha--1, built on 06/09/2016 09:19 GMT
2016-06-09 09:22:33,395 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:host.name=footstep-server-2
2016-06-09 09:22:33,395 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.version=1.8.0_91
2016-06-09 09:22:33,396 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.vendor=Oracle Corporation
2016-06-09 09:22:33,396 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.home=/usr/lib/jvm/java-8-openjdk-amd64/jre
2016-06-09 09:22:33,397 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.class.path=/opt/zookeeper/bin/../build/classes:/opt/zookeeper/bin/../build/lib/slf4j-log4j12-1.7.5.jar:/opt/zookeeper/bin/../build/lib/slf4j-api-1.7.5.jar:/opt/zookeeper/bin/../build/lib/servlet-api-2.5-20081211.jar:/opt/zookeeper/bin/../build/lib/netty-3.7.0.Final.jar:/opt/zookeeper/bin/../build/lib/log4j-1.2.16.jar:/opt/zookeeper/bin/../build/lib/jline-2.11.jar:/opt/zookeeper/bin/../build/lib/jetty-util-6.1.26.jar:/opt/zookeeper/bin/../build/lib/jetty-6.1.26.jar:/opt/zookeeper/bin/../build/lib/javacc.jar:/opt/zookeeper/bin/../build/lib/jackson-mapper-asl-1.9.11.jar:/opt/zookeeper/bin/../build/lib/jackson-core-asl-1.9.11.jar:/opt/zookeeper/bin/../build/lib/commons-cli-1.2.jar:/opt/zookeeper/bin/../lib/*.jar:/opt/zookeeper/bin/../zookeeper-*.jar:/opt/zookeeper/bin/../src/java/lib/ivy-2.2.0.jar:/opt/zookeeper/bin/../conf:
2016-06-09 09:22:33,397 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib/x86_64-linux-gnu/jni:/lib/x86_64-linux-gnu:/usr/lib/x86_64-linux-gnu:/usr/lib/jni:/lib:/usr/lib
2016-06-09 09:22:33,398 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.io.tmpdir=/tmp
2016-06-09 09:22:33,398 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:java.compiler=<NA>
2016-06-09 09:22:33,399 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:os.name=Linux
2016-06-09 09:22:33,399 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:os.arch=amd64
2016-06-09 09:22:33,399 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:os.version=4.4.12-boot2docker
2016-06-09 09:22:33,400 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:user.name=root
2016-06-09 09:22:33,401 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:user.home=/root
2016-06-09 09:22:33,401 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:user.dir=/
2016-06-09 09:22:33,401 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:os.memory.free=9MB
2016-06-09 09:22:33,402 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:os.memory.max=966MB
2016-06-09 09:22:33,402 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Environment@109]
- Server environment:os.memory.total=15MB
2016-06-09 09:22:33,403 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):ZooKeeperServer@858]
- minSessionTimeout set to 4000
2016-06-09 09:22:33,404 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):ZooKeeperServer@867]
- maxSessionTimeout set to 40000
2016-06-09 09:22:33,405 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):ZooKeeperServer@156]
- Created server with tickTime 2000 minSessionTimeout 4000 maxSessionTimeout 40000 datadir
/opt/zookeeper/logs/version-2 snapdir /opt/zookeeper/var/version-2
2016-06-09 09:22:33,406 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Follower@66]
- FOLLOWING - LEADER ELECTION TOOK - 28
2016-06-09 09:22:33,434 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Learner@369]
- Getting a snapshot from leader
2016-06-09 09:22:33,442 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Learner@509]
- Learner received NEWLEADER message
2016-06-09 09:22:33,446 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):FileTxnSnapLog@298]
- Snapshotting: 0x100000001 to /opt/zookeeper/var/version-2/snapshot.100000001
2016-06-09 09:22:33,452 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):Learner@493]
- Learner received UPTODATE message
2016-06-09 09:22:33,457 [myid:2] - INFO  [QuorumPeer[myid=2](plain=/0:0:0:0:0:0:0:0:2181)(secure=disabled):CommitProcessor@254]
- Configuring CommitProcessor with 1 worker threads.


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