[ 
https://issues.apache.org/jira/browse/ZOOKEEPER-2592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16351231#comment-16351231
 ] 

caixiaofeng commented on ZOOKEEPER-2592:
----------------------------------------

Zookeeper is not recoverable once running system( machine on which zookeeper is 
running) is out of space 

---------------> after 3.5.3  zookeeper will monitor its space, if disk space 
usage is bigger than 95%. it will shutdown auto.

> 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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