Resourcemanager connection refused

[#1]

Trying to setup ambari & installing YARN , but getting 1 critical error Connection failed to http://at-r3p11:8088 (<urlopen error [Errno 111] Connection refused>) , while HDFS & Mapreduce2 service working fine..

[#2 · Accepted solution]

@Bhavesh Gadoya

--> Please check if your RM is up and running

--> If RM is running, please verify if it's listening on 8088 by running netstat command from RM host.

--> If RM is listening on 8088, please see if you are able to connect to RM by remote host on 8088 by telnet

--> If you are not able to connect to RM by telnet then there must be some firewall which is blocking port 8088

--> If RM is down, check /var/log/hadoop-yarn/yarn/yarn-yarn-resourcemanager-<hostname>.log

[#3]

Thanks for answer @kuldeep , i found that my zookeeper wasn't running hence it wasn't able to connect..