- 05 Oct, 2021
- 0 Comments
- 46 Secs Read
Steps to resolve when Datanode services is not starting
Check the hadoop services status. Below datanode service is not running
hdoop@hadoop:~$ jps 2258 ResourceManager 1730 NameNode 2038 SecondaryNameNode 2391 NodeManager 2735 Jps
go to core-site.xml and check the path of tmp directory. We need to remove and create same directory
hdoop@hadoop:~/hadoop-3.2.1/etc/hadoop$ pwd
/home/hdoop/hadoop-3.2.1/etc/hadoop
<configuration>
<property>
<name>hadoop.tmp.dir</name>
<value>/home/hdoop/tmpdata</value>
<description>A base for other temporary directories.</description>
</property>
<property>
<name>fs.default.name</name>
<value>hdfs://127.0.0.1:9000</value>
<description>The name of the default file system></description>
</property>
</configuration>
rm -rf /home/hdoop/tmpdata
mkdir -p /home/hdoop/tmpdata
open hdfs-site.xml and remove datanode and namenode directory
vi hdfs-site.xml rm -rf /home/hdoop/dfsdata/namenode rm -rf /home/hdoop/dfsdata/datanode/ mkdir -p /home/hdoop/dfsdata/namenode mkdir -p /home/hdoop/dfsdata/datanode/
Format namenode and start all services. You will find datanode there
hadoop namenode -format start-all.sh hdoop@hadoop:~/hadoop-3.2.1/etc/hadoop$ jps 4064 SecondaryNameNode 3729 NameNode 4264 ResourceManager 3866 DataNode 4717 Jps 4398 NodeManager