Storing and Configuring Data with Hadoop, YARN, and ZooKeeper - Big Data Made Easy: A Working Guide to the Complete Hadoop Toolset - page 22

14/03/15 16:08:20 INFO namenode.FSNamesystem: isAccessTokenEnabled=false accessKeyUpdateInterval=0
min(s), accessTokenLifetime=0 min(s)
14/03/15 16:08:20 INFO namenode.FSEditLog: dfs.namenode.edits.toleration.length = 0
14/03/15 16:08:20 INFO namenode.NameNode: Caching file names occuring more than 10 times
14/03/15 16:08:20 INFO common.Storage: Image file /app/hadoop/tmp/dfs/name/current/fsimage of size
112 bytes saved in 0 seconds.
14/03/15 16:08:20 INFO namenode.FSEditLog: closing edit log: position=4, editlog=/app/hadoop/tmp/
dfs/name/current/edits
14/03/15 16:08:20 INFO namenode.FSEditLog: close success: truncate to 4, editlog=/app/hadoop/tmp/
dfs/name/current/edits
14/03/15 16:08:21 INFO common.Storage: Storage directory /app/hadoop/tmp/dfs/name has been
successfully formatted.
14/03/15 16:08:21 INFO namenode.NameNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down NameNode at hc1nn/192.168.1.107
************************************************************/

Now you test that you can start, check, and stop the Hadoop servers on a standalone node without errors. Start
the servers by using:

start-all.sh

You will see this:

starting namenode, logging to
/usr/local/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-namenode-hc1nn.out
localhost: starting datanode, logging to
/usr/local/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-datanode-hc1nn.out
localhost: starting secondarynamenode, logging to
/usr/local/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-secondarynamenode-hc1nn.out
starting jobtracker, logging to
/usr/local/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-jobtracker-hc1nn.out
localhost: starting tasktracker, logging to
/usr/local/hadoop-1.2.1/libexec/../logs/hadoop-hadoop-tasktracker-hc1nn.out

Now, check that the servers are running. Note that you should expect to see the following:

• Name node

• Secondary name node

• Job Tracker

• Task Tracker

• Data node

Running on the master server hc1nn, use the jps command to list the servers that are running:

[hadoop@hc1nn ~]$ jps
2116 SecondaryNameNode
2541 Jps
2331 TaskTracker
2194 JobTracker