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 a

Answer 1

I experienced an issue with very similar symptoms although it was the nodemanager not connecting to the resource manager. The problem was that in yarn-site.xml there is (or may be) a property named "yarn.nodemanager.hostname". That setting had been accidentally populated with the hostname of the HDFS "namenode" but it is supposed to contain the hostname of the YARN per-node "nodemanager". Depending on what was entered for other properties this was causing various errors like "Retrying connect", "Connection refused", or resource allocation errors. Setting this to "0.0.0.0" (the default) fixed the problem.