hadoop - YARN Resourcemanager not connecting to nodemanager

Question

thanks in advance for any help

I am running the following versions:

Hadoop 2.2 zookeeper 3.4.5 Hbase 0.96 Hive 0.12

When I go to http://:50070 I am able to correctly see that 2 nodes are running.

The problem is when I go to http://:8088 it shows 0 nodes running.

I understand that :8088 reflects the resourcemanager and shows the number of nodemanagers running. The daemons all start, but it would appear that the nodemanagers aren't connecting to the resourcemanager.

This is the log file:

2013-12-16 20:55:48,648 INFO org.apache.hadoop.yarn.client.RMProxy: Connecting to ResourceManager at /127.0.0.1:8031
2013-12-16 20:55:49,755 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:8031. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2013-12-16 20:55:50,756 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:8031. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2013-12-16 20:55:51,757 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:8031. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2013-12-16 20:55:52,758 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:8031. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2013-12-16 20:55:53,759 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:8031. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)
2013-12-16 20:55:54,760 INFO org.apache.hadoop.ipc.Client: Retrying connect to server: localhost/127.0.0.1:8031. Already tried 5 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1 SECONDS)

I have checked and port 8031 is open.

EDIT:

For people viewing this in the future, I needed to edit my yarn-site.xml to look like the following:

<property>
   <name>yarn.nodemanager.aux-services</name>
   <value>mapreduce_shuffle</value>
</property>
<property>
   <name>yarn.nodemanager.aux-services.mapreduce.shuffle.class</name>
   <value>org.apache.hadoop.mapred.ShuffleHandler</value>
</property>
<property>
   <name>yarn.resourcemanager.scheduler.address</name>
   <value>master-1:8030</value>
</property>
<property>
   <name>yarn.resourcemanager.address</name>
   <value>master-1:8032</value>
</property>
<property>
   <name>yarn.resourcemanager.webapp.address</name>
   <value>master-1:8088</value>
</property>
<property>
   <name>yarn.resourcemanager.resource-tracker.address</name>
   <value>master-1:8031</value>
</property>
<property>
   <name>yarn.resourcemanager.admin.address</name>
   <value>master-1:8033</value>
</property> 

Answer 1

I had a very similar problem, and it was solved just by specifying the ResourceManager hostname, no need to spell out the exact address per service.

<property>
  <name>yarn.resourcemanager.hostname</name>
  <value>master-1</value>
</property>