Support Questions
Find answers, ask questions, and share your expertise
Announcements
Alert: Welcome to the Unified Cloudera Community. Former HCC members be sure to read and learn how to activate your account here.

Hadoop Namenode is no up

Solved Go to solution

Hadoop Namenode is no up

New Contributor

I configured the hadoop, and i check the status using sudo jps

aruna@aruna:~/hadoop-2.7.3/sbin$ sudo jps
[sudo] password for aruna: 
10736 DataNode
16497 Jps
10915 SecondaryNameNode
16453 JobHistoryServer
14903 NodeManager
14734 ResourceManager

But the Namenode is not running.How can i up the Namenode ?

1 ACCEPTED SOLUTION

Accepted Solutions

Re: Hadoop Namenode is no up

New Contributor

Thanks @ssathish i remove the Hadoop and start from the begining. Now its working fine.

2 REPLIES 2

Re: Hadoop Namenode is no up

Hi @Aruna Sameera

If it is not a single node cluster, check the node where namenode has to be started by checking the conf file - hdfs-site.xml(/etc/hadoop/conf/hdfs-site.xml).

Namenode node is provided in the given property in hdfs-site.xml

 <property>
      <name>dfs.namenode.http-address</name>
      <value>Node:port</value>
    </property>
    <property>
      <name>dfs.namenode.https-address</name>
      <value>node:port</value>
    </property>

Once inside the node, find the namenode daemon.

Namenode daemon is present in HADOOP_HOME which can be found in /etc/hadoop/conf/hadoop-env.sh

 # Hadoop home directory
      export HADOOP_HOME=${HADOOP_HOME:-/usr/hdp/current/hadoop-client}
Start the namenode deamon as hdfs user


sudo su --c "/usr/hdp/current/hadoop-client/sbin/hadoop-daemon.sh start
 namenode" hdfs

If the namenode is still not started, please paste the logs which can be found at /etc/hadoop/conf/hadoop-env.sh

  # Where log files are stored.  $HADOOP_HOME/logs by default.
      export HADOOP_LOG_DIR=/grid/0/log/hdfs/$USER

Re: Hadoop Namenode is no up

New Contributor

Thanks @ssathish i remove the Hadoop and start from the begining. Now its working fine.