Storing and Configuring Data with Hadoop, YARN, and ZooKeeper - Big Data Made Easy: A Working Guide to the Complete Hadoop Toolset - page 35

environment:os.version=2.6.32-220.el6.i686
2014-03-20 19:09:34,012 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:Environment@100] - Server
environment:user.name=zookeeper
2014-03-20 19:09:34,013 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:Environment@100] - Server
environment:user.home=/var/run/zookeeper
2014-03-20 19:09:34,014 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:Environment@100] - Server
environment:user.dir=/
2014-03-20 19:09:34,028 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:ZooKeeperServer@162] - Created server with
tickTime 2000 minSessionTimeout 4000 maxSessionTimeout 40000 datadir
/var/lib/zookeeper/version-2 snapdir /var/lib/zookeeper/version-2
2014-03-20 19:09:34,030 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:Follower@63] - FOLLOWING - LEADER ELECTION
TOOK - 83
2014-03-20 19:09:34,145 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:Learner@325] - Getting a snapshot from leader
2014-03-20 19:09:34,154 [myid:3] - INFO
[QuorumPeer[myid=3]/0.0.0.0:2181:FileTxnSnapLog@273] - Snapshotting:
0x100000000 to /var/lib/zookeeper/version-2/snapshot.100000000
Manually Accessing the ZooKeeper Servers
Using the server name, main port number, and some four-letter words, you can manually access the ZooKeeper
servers. Specifically, you can use the nc command to issue additional four-letter commands. This type of access to
ZooKeeper might be useful when you're investigating problems with the servers or just checking that all is okay.
For this setup, the configuration file lists the main port on each server as 2181. To access the configuration details
for server hc1r1m2, therefore, you use the nc command to issue a conf command. Press Enter after both the nc
command line and the conf command on the following line:
[hadoop@hc1r1m2 ~]$ nc hc1r1m2 2181
conf
clientPort=2181
dataDir=/var/lib/zookeeper/version-2
dataLogDir=/var/lib/zookeeper/version-2
tickTime=2000
maxClientCnxns=50
minSessionTimeout=4000
maxSessionTimeout=40000
serverId=2
initLimit=10
syncLimit=5
electionAlg=3
electionPort=61050
quorumPort=60050
peerType=0