question Re: is it require to start Hadoop deamons when machin shutdown and start in Archives of Support Questions (Read Only)

is it require to start Hadoop deamons when machin shutdown and start

asliyanage — Mon, 20 Feb 2017 11:12:37 GMT

I have installed the hadoop properly.Now all the nodes runnig. But when i shutdown the machine and start it , do i need to start hadoop deamons each and every time ?

aruna@aruna:~/hadoop-2.7.3/sbin$ sudo jps

4256SecondaryNameNode

3921NameNode

4437ResourceManager

4918Jps

4074DataNode

4876JobHistoryServer

4733NodeManager

Re: is it require to start Hadoop deamons when machin shutdown and start

sunile_manjee — Sun, 26 Feb 2017 09:33:47 GMT

Take a look at ambari auto start services feature in ambari 2.4.x

Here is the documenation

https://cwiki.apache.org/confluence/display/AMBARI/Recovery%3A+auto+start+components#Recovery:autostartcomponents-240Onwards

Re: is it require to start Hadoop deamons when machin shutdown and start

namaheshwari — Sun, 26 Feb 2017 09:45:33 GMT

@Aruna Sameera- It all depends whether you have set up the cluster manually or using Ambari

If you have set it up manually you would need to start all the services manually on the cluster in this order:
- https://community.hortonworks.com/questions/41253/whats-the-best-order-of-startingstoping-hdfs-servi.html#answer-42783
If you have used Ambari to setup the cluster and the version of Ambari is 2.4.x or newer, you can use the auto start services feature as mentioned above
Else you can use follow the below order:
- https://community.hortonworks.com/questions/10316/what-is-best-way-to-reboot-machines-in-the-hadoop.html