here are few 4 words commands you can use with zookeeper to know the stats and status of zookeeper
[root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# echo ruok | nc `hostname` 5181 imok[root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# echo stat | nc `hostname` 5181 Zookeeper version: 3.4.5-mapr-1406--1, built on 01/19/2015 22:57 GMT Clients: /10.0.0.251:57652[0](queued=0,recved=1,sent=0) /10.0.0.251:57623[1](queued=0,recved=9151,sent=9158) /10.0.0.251:57643[1](queued=0,recved=9120,sent=9125) /10.0.0.251:57622[1](queued=0,recved=9156,sent=9164) /10.0.0.251:57624[1](queued=0,recved=12974,sent=12974) /10.0.0.251:57620[1](queued=0,recved=9150,sent=9157) /10.0.0.251:57644[1](queued=0,recved=7708,sent=7966) /10.0.0.251:57626[1](queued=0,recved=9195,sent=9206) /10.0.0.251:57619[1](queued=0,recved=9185,sent=9186) /10.0.0.251:57621[1](queued=0,recved=9143,sent=9149) Latency min/avg/max: 0/0/63 Received: 85043 Sent: 85345 Connections: 10 Outstanding: 0 Zxid: 0x136 Mode: standalone Node count: 59 [root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# echo conf | nc `hostname` 5181 clientPort=5181 dataDir=/opt/mapr/zkdata/version-2 dataLogDir=/opt/mapr/zkdata/version-2 tickTime=2000 maxClientCnxns=100 minSessionTimeout=4000 maxSessionTimeout=40000 serverId=0 [root@ip-10-0-0-251 ~]# echo cons | nc `hostname` 5181 /10.0.0.251:57623[1](queued=0,recved=9162,sent=9169,sid=0x14f1efc29d70004,lop=PING,est=1439333921242,to=30000,lcxid=0x1d,lzxid=0x136,lresp=1439425306327,llat=0,minlat=0,avglat=0,maxlat=2) /10.0.0.251:57643[1](queued=0,recved=9131,sent=9136,sid=0x14f1efc29d70008,lop=PING,est=1439334130760,to=30000,lcxid=0x13,lzxid=0x136,lresp=1439425306958,llat=0,minlat=0,avglat=0,maxlat=2) /10.0.0.251:57654[0](queued=0,recved=1,sent=0) /10.0.0.251:57622[1](queued=0,recved=9166,sent=9174,sid=0x14f1efc29d70003,lop=PING,est=1439333921221,to=30000,lcxid=0x22,lzxid=0x136,lresp=1439425302064,llat=0,minlat=0,avglat=0,maxlat=5) /10.0.0.251:57624[1](queued=0,recved=12989,sent=12989,sid=0x14f1efc29d70005,lop=GETC,est=1439333936044,to=30000,lcxid=0x1aef,lzxid=0x136,lresp=1439425303437,llat=0,minlat=0,avglat=0,maxlat=6) /10.0.0.251:57620[1](queued=0,recved=9161,sent=9168,sid=0x14f1efc29d70001,lop=PING,est=1439333921154,to=30000,lcxid=0x1d,lzxid=0x136,lresp=1439425307676,llat=0,minlat=0,avglat=0,maxlat=4) /10.0.0.251:57644[1](queued=0,recved=7716,sent=7974,sid=0x14f1efc29d70009,lop=PING,est=1439334142657,to=40000,lcxid=0x394,lzxid=0x136,lresp=1439425303832,llat=0,minlat=0,avglat=0,maxlat=16) /10.0.0.251:57626[1](queued=0,recved=9206,sent=9217,sid=0x14f1efc29d70007,lop=PING,est=1439333966309,to=30000,lcxid=0x4f,lzxid=0x136,lresp=1439425306675,llat=0,minlat=0,avglat=0,maxlat=6) /10.0.0.251:57619[1](queued=0,recved=9196,sent=9197,sid=0x14f1efc29d70000,lop=PING,est=1439333920963,to=30000,lcxid=0x41,lzxid=0x136,lresp=1439425304945,llat=0,minlat=0,avglat=0,maxlat=63) /10.0.0.251:57621[1](queued=0,recved=9153,sent=9159,sid=0x14f1efc29d70002,lop=PING,est=1439333921194,to=30000,lcxid=0x15,lzxid=0x136,lresp=1439425302145,llat=0,minlat=0,avglat=0,maxlat=6) [root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# echo envi | nc `hostname` 5181 Environment: zookeeper.version=3.4.5-mapr-1406--1, built on 01/19/2015 22:57 GMT host.name=ip-10-0-0-251 java.version=1.7.0_45 java.vendor=Oracle Corporation java.home=/usr/lib/jvm/java-1.7.0-openjdk-1.7.0.45.x86_64/jre java.class.path=/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../build/classes:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../build/lib/*.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../lib/slf4j-log4j12-1.6.1.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../lib/slf4j-api-1.6.1.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../lib/netty-3.2.2.Final.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../lib/log4j-1.2.15.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../lib/jline-0.9.94.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../zookeeper-3.4.5-mapr-1406.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/bin/../src/java/lib/*.jar:/opt/mapr/zookeeper/zookeeper-3.4.5/conf::/opt/mapr/lib/maprfs-4.0.2-mapr.jar:/opt/mapr/lib/protobuf-java-2.5.0.jar:/opt/mapr/lib/libprotodefs-4.0.2-mapr.jar:/opt/mapr/lib/baseutils-4.0.2-mapr.jar:/opt/mapr/lib/json-20080701.jar:/opt/mapr/lib/flexjson-2.1.jar:/opt/mapr/lib/commons-codec-1.5.jar java.library.path=/opt/mapr/lib java.io.tmpdir=/tmp java.compiler=os.name=Linux os.arch=amd64 os.version=2.6.32-431.el6.x86_64 user.name=mapr user.home=/home/mapr user.dir=/ [root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# [root@ip-10-0-0-251 ~]# echo wchc | nc `hostname` 5181 0x14f1efc29d70004 /services/kvstore/ip-10-0-0-251 /services/hoststats/ip-10-0-0-251 /services/hoststats/master /nodes/ip-10-0-0-251/services/hoststats 0x14f1efc29d70008 /nodes/ip-10-0-0-251/services/drill-bits /services/drill-bits/ip-10-0-0-251 /services/drill-bits/master 0x14f1efc29d70003 /nodes/ip-10-0-0-251/services/cldb /services/kvstore/ip-10-0-0-251 /services/cldb/ip-10-0-0-251 /datacenter/controlnodes/cldb/active/CLDBRunningMaster /services/cldb/master 0x14f1efc29d70005 /datacenter/controlnodes/cldb/active/CLDBMaster 0x14f1efc29d70009 /drill/sys.storage_plugins/hive /drill/sys.storage_plugins/cp /drill/sys.storage_plugins/mongo /drill/MyDrillCluster-402-drillbits/9d62d3ba-f9fa-4ad4-9b9c-684b854d41fe /drill/sys.storage_plugins/hbase /drill/sys.storage_plugins/dfs 0x14f1efc29d70001 /services/webserver/master /nodes/ip-10-0-0-251/services/webserver /services/webserver/ip-10-0-0-251 /services/cldb/master 0x14f1efc29d70007 /services/drill-bits/master /services_config/kvstore/ip-10-0-0-251 /services/kvstore/ip-10-0-0-251 /services/services/drill-bits /services/services/webserver /services_config/drill-bits/ip-10-0-0-251 /services/cldb/master /services/webserver/master /services/drill-bits/ip-10-0-0-251 /services_config/cldb/ip-10-0-0-251 /datacenter/controlnodes/cldb/active/CLDBMaster /services/services/cldb /services/services/kvstore /services/hoststats/ip-10-0-0-251 /services/services/hoststats /services/cldb/ip-10-0-0-251 /services_config/hoststats/ip-10-0-0-251 /services/hoststats/master /services/webserver/ip-10-0-0-251 /services/kvstore/master /services_config/webserver/ip-10-0-0-251 0x14f1efc29d70000 /nodes/ip-10-0-0-251/services/nfs/start /nodes/ip-10-0-0-251/services/hbmaster/start /nodes/ip-10-0-0-251/services/historyserver/stop /nodes/ip-10-0-0-251/sdump /nodes/ip-10-0-0-251/services/hbmaster/stop /nodes/ip-10-0-0-251/services/nfs/stop /nodes/ip-10-0-0-251/services/tasktracker/stop /nodes/ip-10-0-0-251/services/fileserver/stop /nodes/ip-10-0-0-251/services/resourcemanager/stop /nodes/ip-10-0-0-251/services/fileserver/start /servers/ip-10-0-0-251 /nodes/ip-10-0-0-251/services/jobtracker/stop /nodes/ip-10-0-0-251/services/nodemanager/start /nodes/ip-10-0-0-251/services/nodemanager/stop /nodes/ip-10-0-0-251/services/hbregionserver/stop /nodes/ip-10-0-0-251/services/historyserver/start /nodes/ip-10-0-0-251/services/jobtracker/start /nodes/ip-10-0-0-251/services/tasktracker/start /datacenter/controlnodes/cldb/active/CLDBRunningMaster /nodes/ip-10-0-0-251/services/hbregionserver/start /nodes/ip-10-0-0-251/stop /nodes/ip-10-0-0-251/services/resourcemanager/start 0x14f1efc29d70002 /datacenter/license/m7/enabled /services/kvstore/ip-10-0-0-251 /nodes/ip-10-0-0-251/services/kvstore /services/kvstore/master
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