namenode, datanode not list by using jps

Question

Environment: ubuntu 14.04, hadoop 2.6

After I type the start-all.sh and jps, DataNode doesn\'t list on the terminal

Answer 1

Solution is first stop your namenode using go to your /usr/local/hadoop

bin/hdfs namenode -format

then delete hdfs and tmp directory from your home

mkdir ~/tmp
mkdir ~/hdfs
chmod 750 ~/hdfs

goto hadoop directory and start hadoop

`sbin/start-dfs.sh`

it will show the datanode