Hdfs Service Systemd - startup

Question

I want to create a service that starts and stops my hdfs that is associated to my spark cluster.

service descripton:

[Unit]
Description=Hdfs service
[Service]
Type=simple
WorkingDirectory=/home/hduser
ExecStart=/opt/hadoop-2.6.4/sbin/start-service-hdfs.sh
ExecStop=/opt/hadoop-2.6.4/sbin/stop-service-hdfs.sh
[Install]
WantedBy=multi-user.target
 

The problem  I m facing is when i start the service, it starts but it stops just after sometime its been started.
Can anyone tell me what exactly the issue could be??

Thanks in advance!

Answer 1

I guess the issue you are facing is because you are not mentioning the configurations correctly, that is why it is not working.

My HADOOP_HOME is /home/hadoop/user1/etc/hadoop/

Try the below given configuration.

[Unit]
Description=Hadoop DFS namenode and datanode
After=syslog.target network.target remote-fs.target nss-lookup.target network-online.target
Requires=network-online.target

[Service]
User=hadoop
Group=hadoop
Type=forking
ExecStart=/home/hadoop/user1/etc/hadoop/sbin/start-dfs.sh
ExecStop=/home/hadoop/envs/dwh/hadoop/sbin/stop-dfs.sh
WorkingDirectory=/home/hadoop/envs/dwh
Environment=JAVA_HOME=/usr/lib/jvm/java-8-oracle
Environment=HADOOP_HOME=/home/hadoop/user1/etc/hadoop
TimeoutStartSec=1min
Restart=on-failure
PIDFile=/tmp/hadoop-hadoop-namenode.pid

[Install]
WantedBy=multi-user.target

Hope it works for you.