YARN Management

Check YARN System Status
ubuntu@rm:~$ yarn node -list -all
17/12/12 04:11:12 INFO client.RMProxy: Connecting to ResourceManager at rm/172.16.1.201:8032
17/12/12 04:11:13 INFO client.AHSProxy: Connecting to Application History server at rm/172.16.1.201:10200
Total Nodes:2
         Node-Id             Node-State Node-Http-Address       Number-of-Running-Containers
      dn01:38205                RUNNING         dn01:8042                                  0
      dn02:46760                RUNNING         dn02:8042                                  0

Check Node Status

ubuntu@rm:~$ yarn node -status dn01:38205

17/12/12 04:12:10 INFO client.RMProxy: Connecting to ResourceManager at rm/172.16.1.201:8032

17/12/12 04:12:10 INFO client.AHSProxy: Connecting to Application History server at rm/172.16.1.201:10200

Node Report :

        Node-Id : dn01:38205

        Rack : /default-rack

        Node-State : RUNNING

        Node-Http-Address : dn01:8042

        Last-Health-Update : Tue 12/Dec/17 04:11:01:347UTC

        Health-Report :

        Containers : 0

        Memory-Used : 0MB

        Memory-Capacity : 8192MB

        CPU-Used : 0 vcores

        CPU-Capacity : 8 vcores

        Node-Labels :

        Resource Utilization by Node : PMem:469 MB, VMem:469 MB, VCores:0.61646116

        Resource Utilization by Containers : PMem:0 MB, VMem:0 MB, VCores:0.0

Adjust resource configuration per real physical resource

ubuntu@rm:~$ sudo vi /opt/hadoop-2.8.2/etc/hadoop/yarn-site.xml

Added
:::
        <property>
                <name>yarn.nodemanager.resource.memory-mb</name>
                <value>1024</value>
        </property>
        <property>
                <name>yarn.nodemanager.resource.cpu-vcores</name>
                <value>2</value>
        </property>

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