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Posted to dev@zookeeper.apache.org by "Lasaro Camargos (JIRA)" <ji...@apache.org> on 2016/11/02 13:46:58 UTC
[jira] [Comment Edited] (ZOOKEEPER-2592) Zookeeper is not
recoverable once running system( machine on which zookeeper is running) is
out of space
[ https://issues.apache.org/jira/browse/ZOOKEEPER-2592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15629015#comment-15629015 ]
Lasaro Camargos edited comment on ZOOKEEPER-2592 at 11/2/16 1:46 PM:
---------------------------------------------------------------------
Dear all,
I believe I've hit this bug while running 3.4.8. I'd be willing to work on this bug, but we would need to agree on the right behavior first. Should the problematic node fail fast? If it is the leader, should it give up leadership?
Regards.
was (Author: lasaro):
Dear all,
I believe I've hit this bug while running 3.4.8.
Regards.
> Zookeeper is not recoverable once running system( machine on which zookeeper is running) is out of space
> --------------------------------------------------------------------------------------------------------
>
> Key: ZOOKEEPER-2592
> URL: https://issues.apache.org/jira/browse/ZOOKEEPER-2592
> Project: ZooKeeper
> Issue Type: Bug
> Components: server
> Affects Versions: 3.5.1, 3.5.2
> Reporter: Rakesh Kumar Singh
> Priority: Critical
>
> Zookeeper is not recoverable once running system( machine on which zookeeper is running) is out of space
> Steps to reproduce:-
> 1. Install zookeeper on standalone mode and start zookeeper
> 2. Make the machine physical memory full
> 3. Connect through client to zookeeper and trying create some znodes with some data.
> 4. After sometime creating further znode will not happened as complete memory is occupied
> 5. Now start creating space in that machine
> 6. Again connect through a client. Connection is fine. Now try to execute any command like "ls / " it fails even though now space is more than 11gb
> Client log:-
> BLR1000007042:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin # df -h
> Filesystem Size Used Avail Use% Mounted on
> /dev/xvda2 36G 24G 11G 70% /
> udev 1.9G 116K 1.9G 1% /dev
> tmpfs 1.9G 0 1.9G 0% /dev/shm
> BLR1000007042:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin # ./zkCli.sh
> Connecting to localhost:2181
> 2016-09-19 22:50:20,227 [myid:] - INFO [main:Environment@109] - Client environment:zookeeper.version=3.5.1-alpha--1, built on 08/18/2016 08:20 GMT
> 2016-09-19 22:50:20,231 [myid:] - INFO [main:Environment@109] - Client environment:host.name=BLR1000007042
> 2016-09-19 22:50:20,231 [myid:] - INFO [main:Environment@109] - Client environment:java.version=1.7.0_79
> 2016-09-19 22:50:20,234 [myid:] - INFO [main:Environment@109] - Client environment:java.vendor=Oracle Corporation
> 2016-09-19 22:50:20,234 [myid:] - INFO [main:Environment@109] - Client environment:java.home=/usr/java/jdk1.7.0_79/jre
> 2016-09-19 22:50:20,234 [myid:] - INFO [main:Environment@109] - Client environment:java.class.path=/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../build/classes:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../build/lib/*.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/slf4j-log4j12-1.7.5.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/slf4j-api-1.7.5.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/servlet-api-2.5-20081211.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/netty-3.7.0.Final.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/log4j-1.2.16.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jline-2.11.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jetty-util-6.1.26.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jetty-6.1.26.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/javacc.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jackson-mapper-asl-1.9.11.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jackson-core-asl-1.9.11.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/commons-cli-1.2.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/ant-eclipse-1.0-jvm1.2.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../zookeeper-3.5.1-alpha.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../src/java/lib/ant-eclipse-1.0-jvm1.2.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../conf:/usr/java/jdk1.7.0_79/lib
> 2016-09-19 22:50:20,234 [myid:] - INFO [main:Environment@109] - Client environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
> 2016-09-19 22:50:20,234 [myid:] - INFO [main:Environment@109] - Client environment:java.io.tmpdir=/tmp
> 2016-09-19 22:50:20,234 [myid:] - INFO [main:Environment@109] - Client environment:java.compiler=<NA>
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:os.name=Linux
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:os.arch=amd64
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:os.version=3.0.76-0.11-default
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:user.name=root
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:user.home=/root
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:user.dir=/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin
> 2016-09-19 22:50:20,235 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.free=52MB
> 2016-09-19 22:50:20,237 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.max=227MB
> 2016-09-19 22:50:20,238 [myid:] - INFO [main:Environment@109] - Client environment:os.memory.total=57MB
> 2016-09-19 22:50:20,241 [myid:] - INFO [main:ZooKeeper@716] - Initiating client connection, connectString=localhost:2181 sessionTimeout=30000 watcher=org.apache.zookeeper.ZooKeeperMain$MyWatcher@3865db85
> Welcome to ZooKeeper!
> 2016-09-19 22:50:20,264 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1138] - Opening socket connection to server localhost/127.0.0.1:2181. Will not attempt to authenticate using SASL (unknown error)
> 2016-09-19 22:50:20,270 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@980] - Socket connection established, initiating session, client: /127.0.0.1:47801, server: localhost/127.0.0.1:2181
> JLine support is enabled
> [INFO] Unable to bind key for unsupported operation: backward-delete-word
> [INFO] Unable to bind key for unsupported operation: backward-delete-word
> [INFO] Unable to bind key for unsupported operation: down-history
> [INFO] Unable to bind key for unsupported operation: up-history
> [INFO] Unable to bind key for unsupported operation: up-history
> [INFO] Unable to bind key for unsupported operation: down-history
> [INFO] Unable to bind key for unsupported operation: up-history
> [INFO] Unable to bind key for unsupported operation: down-history
> [INFO] Unable to bind key for unsupported operation: up-history
> [INFO] Unable to bind key for unsupported operation: down-history
> [INFO] Unable to bind key for unsupported operation: up-history
> [INFO] Unable to bind key for unsupported operation: down-history
> [zk: localhost:2181(CONNECTING) 0] ls /
> 2016-09-19 22:50:35,280 [myid:] - INFO [main-SendThread(localhost:2181):ClientCnxn$SendThread@1251] - Client session timed out, have not heard from server in 15011ms for sessionid 0x0, closing socket connection and attempting reconnect
> Exception in thread "main" org.apache.zookeeper.KeeperException$ConnectionLossException: KeeperErrorCode = ConnectionLoss for /
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:99)
> at org.apache.zookeeper.KeeperException.create(KeeperException.java:51)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:2255)
> at org.apache.zookeeper.ZooKeeper.getChildren(ZooKeeper.java:2283)
> at org.apache.zookeeper.cli.LsCommand.exec(LsCommand.java:93)
> at org.apache.zookeeper.ZooKeeperMain.processZKCmd(ZooKeeperMain.java:674)
> at org.apache.zookeeper.ZooKeeperMain.processCmd(ZooKeeperMain.java:577)
> at org.apache.zookeeper.ZooKeeperMain.executeLine(ZooKeeperMain.java:360)
> at org.apache.zookeeper.ZooKeeperMain.run(ZooKeeperMain.java:320)
> at org.apache.zookeeper.ZooKeeperMain.main(ZooKeeperMain.java:280)
> BLR1000007042:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin #
> -{color:blue} Server log
> 2016-09-19 22:34:13,380 [myid:] - INFO [main:QuorumPeerConfig@114] - Reading configuration from: /home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../conf/zoo.cfg
> 2016-09-19 22:34:13,386 [myid:] - INFO [main:QuorumPeerConfig@316] - clientPortAddress is 0.0.0.0/0.0.0.0:2181
> 2016-09-19 22:34:13,386 [myid:] - INFO [main:QuorumPeerConfig@320] - secureClientPort is not set
> 2016-09-19 22:34:13,389 [myid:] - INFO [main:DatadirCleanupManager@78] - autopurge.snapRetainCount set to 3
> 2016-09-19 22:34:13,389 [myid:] - INFO [main:DatadirCleanupManager@79] - autopurge.purgeInterval set to 0
> 2016-09-19 22:34:13,390 [myid:] - INFO [main:DatadirCleanupManager@101] - Purge task is not scheduled.
> 2016-09-19 22:34:13,390 [myid:] - WARN [main:QuorumPeerMain@122] - Either no config or no quorum defined in config, running in standalone mode
> 2016-09-19 22:34:13,402 [myid:] - INFO [main:QuorumPeerConfig@114] - Reading configuration from: /home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../conf/zoo.cfg
> 2016-09-19 22:34:13,402 [myid:] - INFO [main:QuorumPeerConfig@316] - clientPortAddress is 0.0.0.0/0.0.0.0:2181
> 2016-09-19 22:34:13,402 [myid:] - INFO [main:QuorumPeerConfig@320] - secureClientPort is not set
> 2016-09-19 22:34:13,403 [myid:] - INFO [main:ZooKeeperServerMain@113] - Starting server
> 2016-09-19 22:34:13,416 [myid:] - INFO [main:Environment@109] - Server environment:zookeeper.version=3.5.1-alpha--1, built on 08/18/2016 08:20 GMT
> 2016-09-19 22:34:13,416 [myid:] - INFO [main:Environment@109] - Server environment:host.name=BLR1000007042
> 2016-09-19 22:34:13,416 [myid:] - INFO [main:Environment@109] - Server environment:java.version=1.7.0_79
> 2016-09-19 22:34:13,417 [myid:] - INFO [main:Environment@109] - Server environment:java.vendor=Oracle Corporation
> 2016-09-19 22:34:13,417 [myid:] - INFO [main:Environment@109] - Server environment:java.home=/usr/java/jdk1.7.0_79/jre
> 2016-09-19 22:34:13,419 [myid:] - INFO [main:Environment@109] - Server environment:java.class.path=/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../build/classes:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../build/lib/*.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/slf4j-log4j12-1.7.5.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/slf4j-api-1.7.5.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/servlet-api-2.5-20081211.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/netty-3.7.0.Final.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/log4j-1.2.16.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jline-2.11.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jetty-util-6.1.26.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jetty-6.1.26.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/javacc.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jackson-mapper-asl-1.9.11.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/jackson-core-asl-1.9.11.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/commons-cli-1.2.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../lib/ant-eclipse-1.0-jvm1.2.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../zookeeper-3.5.1-alpha.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../src/java/lib/ant-eclipse-1.0-jvm1.2.jar:/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin/../conf:/usr/java/jdk1.7.0_79/lib
> 2016-09-19 22:34:13,420 [myid:] - INFO [main:Environment@109] - Server environment:java.library.path=/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib
> 2016-09-19 22:34:13,420 [myid:] - INFO [main:Environment@109] - Server environment:java.io.tmpdir=/tmp
> 2016-09-19 22:34:13,420 [myid:] - INFO [main:Environment@109] - Server environment:java.compiler=<NA>
> 2016-09-19 22:34:13,420 [myid:] - INFO [main:Environment@109] - Server environment:os.name=Linux
> 2016-09-19 22:34:13,420 [myid:] - INFO [main:Environment@109] - Server environment:os.arch=amd64
> 2016-09-19 22:34:13,421 [myid:] - INFO [main:Environment@109] - Server environment:os.version=3.0.76-0.11-default
> 2016-09-19 22:34:13,421 [myid:] - INFO [main:Environment@109] - Server environment:user.name=root
> 2016-09-19 22:34:13,421 [myid:] - INFO [main:Environment@109] - Server environment:user.home=/root
> 2016-09-19 22:34:13,421 [myid:] - INFO [main:Environment@109] - Server environment:user.dir=/home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/bin
> 2016-09-19 22:34:13,421 [myid:] - INFO [main:Environment@109] - Server environment:os.memory.free=51MB
> 2016-09-19 22:34:13,422 [myid:] - INFO [main:Environment@109] - Server environment:os.memory.max=889MB
> 2016-09-19 22:34:13,422 [myid:] - INFO [main:Environment@109] - Server environment:os.memory.total=57MB
> 2016-09-19 22:34:13,424 [myid:] - INFO [main:ZooKeeperServer@858] - minSessionTimeout set to 4000
> 2016-09-19 22:34:13,424 [myid:] - INFO [main:ZooKeeperServer@867] - maxSessionTimeout set to 40000
> 2016-09-19 22:34:13,424 [myid:] - INFO [main:ZooKeeperServer@156] - Created server with tickTime 2000 minSessionTimeout 4000 maxSessionTimeout 40000 datadir /home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/zoo_log/version-2 snapdir /home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/data/version-2
> 2016-09-19 22:34:13,453 [myid:] - INFO [main:Slf4jLog@67] - Logging to org.slf4j.impl.Log4jLoggerAdapter(org.mortbay.log) via org.mortbay.log.Slf4jLog
> 2016-09-19 22:34:13,477 [myid:] - INFO [main:Slf4jLog@67] - jetty-6.1.26
> 2016-09-19 22:34:13,510 [myid:] - INFO [main:Slf4jLog@67] - Started SelectChannelConnector@0.0.0.0:8080
> 2016-09-19 22:34:13,514 [myid:] - INFO [main:JettyAdminServer@105] - Started AdminServer on address 0.0.0.0, port 8080 and command URL /commands
> 2016-09-19 22:34:13,521 [myid:] - INFO [main:NIOServerCnxnFactory@673] - Configuring NIO connection handler with 10s sessionless connection timeout, 1 selector thread(s), 8 worker threads, and 64 kB direct buffers.
> 2016-09-19 22:34:13,523 [myid:] - INFO [main:NIOServerCnxnFactory@686] - binding to port 0.0.0.0/0.0.0.0:2181
> 2016-09-19 22:34:13,537 [myid:] - INFO [main:FileTxnSnapLog@298] - Snapshotting: 0x0 to /home/Rakesh/Zookeeper/18_Aug/cluster/zookeeper-3.5.1-alpha/data/version-2/snapshot.0
> 2016-09-19 22:34:13,567 [myid:] - INFO [main:ContainerManager@64] - Using checkIntervalMs=60000 maxPerMinute=10000
> 2016-09-19 22:35:41,907 [myid:] - INFO [NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection from /0:0:0:0:0:0:0:1:49485
> 2016-09-19 22:35:41,917 [myid:] - INFO [NIOWorkerThread-1:ZooKeeperServer@964] - Client attempting to establish new session at /0:0:0:0:0:0:0:1:49485
> 2016-09-19 22:35:41,919 [myid:] - INFO [SyncThread:0:FileTxnLog@200] - Creating new log file: log.1
> 2016-09-19 22:35:41,952 [myid:] - INFO [SyncThread:0:ZooKeeperServer@678] - Established session 0x100632436270000 with negotiated timeout 30000 for client /0:0:0:0:0:0:0:1:49485
> 2016-09-19 22:40:21,211 [myid:] - INFO [NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection from /10.18.221.194:34892
> 2016-09-19 22:40:21,218 [myid:] - INFO [NIOWorkerThread-8:ZooKeeperServer@964] - Client attempting to establish new session at /10.18.221.194:34892
> 2016-09-19 22:40:21,221 [myid:] - INFO [SyncThread:0:ZooKeeperServer@678] - Established session 0x100632436270001 with negotiated timeout 30000 for client /10.18.221.194:34892
> 2016-09-19 22:40:40,298 [myid:] - INFO [ProcessThread(sid:0 cport:2181)::PrepRequestProcessor@649] - Processed session termination for sessionid: 0x100632436270001
> 2016-09-19 22:40:40,301 [myid:] - INFO [NIOWorkerThread-3:MBeanRegistry@119] - Unregister MBean [org.apache.ZooKeeperService:name0=StandaloneServer_port2181,name1=Connections,name2=10.18.221.194,name3=0x100632436270001]
> 2016-09-19 22016-09-19 22:43:47,733 [myid:] - INFO [SyncThread:0:ZooKeeperServer@498] - shutting down
> 2016-09-19 22:44:39,892 [myid:] - INFO [NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection from /127.0.0.1:47796
> 2016-09-19 22:44:39,898 [myid:] - INFO [NIOWorkerThread-2:ZooKeeperServer@964] - Client attempting to establish new session at /127.0.0.1:47796
> 2016-09-19 22:45:15,883 [myid:] - INFO [NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection from /0:0:0:0:0:0:0:1:49493
> 2016-09-19 22:45:15,890 [myid:] - INFO [NIOWorkerThread-3:ZooKeeperServer@964] - Client attempting to establish new session at /0:0:0:0:0:0:0:1:49493
> 2016-09-19 22:45:16,000 [myid:] - INFO [ConnnectionExpirer:NIOServerCnxn@606] - Closed socket connection for client /127.0.0.1:47796 which had sessionid 0x100632436270012
> 2016-09-19 22:45:46,000 [myid:] - INFO [ConnnectionExpirer:NIOServerCnxn@606] - Closed socket connection for client /0:0:0:0:0:0:0:1:49493 which had sessionid 0x100632436270013
> 2016-09-19 22:47:42,512 [myid:] - INFO [NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection from /0:0:0:0:0:0:0:1:49494
> 2016-09-19 22:47:42,519 [myid:] - INFO [NIOWorkerThread-4:ZooKeeperServer@964] - Client attempting to establish new session at /0:0:0:0:0:0:0:1:49494
> 2016-09-19 22:48:16,001 [myid:] - INFO [ConnnectionExpirer:NIOServerCnxn@606] - Closed socket connection for client /0:0:0:0:0:0:0:1:49494 which had sessionid 0x100632436270014
> 2016-09-19 22:50:20,268 [myid:] - INFO [NIOServerCxnFactory.AcceptThread:0.0.0.0/0.0.0.0:2181:NIOServerCnxnFactory$AcceptThread@296] - Accepted socket connection from /127.0.0.1:47801
> 2016-09-19 22:50:20,275 [myid:] - INFO [NIOWorkerThread-5:ZooKeeperServer@964] - Client attempting to establish new session at /127.0.0.1:47801
> 2016-09-19 22:50:56,000 [myid:] - INFO [ConnnectionExpirer:NIOServerCnxn@606] - Closed socket connection for client /127.0.0.1:47801 which had sessionid 0x100632436270015
> {color}
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