CODEWITHSUNDEEP
hadoop
Sadanand Howal
Sadanand Howal

Reputation: 21

Name node is not displaying iwhen I hit JPS command

17223 JobTracker 16897 DataNode 17518 Jps 17451 TaskTracker 17129 SecondaryNameNode 8571 FsShell

Name node is not displaying

Upvotes: 2

Views: 17128

Answers (3)

Roshan Khandelwal
Roshan Khandelwal

Reputation: 973

Should always check the logs.. :)

Upvotes: 0

SachinJose
SachinJose

Reputation: 8522

Seems like you are using the same user for starting all users, so If namenode is coming in the jps output, Probably namenode daemons might be got killed to not started properly. you may use the following command for ensuring namenode process running or not

ps aux | grep -i namenode

If not running you may need to format your namenode before starting hdfs service, stop all hdfs deamons using stop-dfs.sh script then format your namenode using the below command and start HDFS using the start-dfs.sh script. 

hadoop namenode -format

Go through the below SO post if you are hitting the below situation.

Hadoop namenode needs to be formatted after every computer start

Upvotes: 5

scalauser
scalauser

Reputation: 1327

If you are looking to check all running JVMs on the host via 'jps', you need to run the command as root. Otherwise, 'jps' will only show JVMs running as your currently logged-in user.

Please see this link for more: https://groups.google.com/a/cloudera.org/forum/#!topic/cdh-user/1dlxmB_GVuU

Upvotes: 1

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