How Do You Troubleshoot the Hadoop Error “Connecting to ResourceManager”?

Problem scenario
You run a Hadoop command, but you get this error:

2020-12-20 18:19:33,706 INFO client.DefaultNoHARMFailoverProxyProvider: Connecting to ResourceManager at /
2020-12-20 18:19:36,068 INFO ipc.Client: Retrying connect to server: Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)

You tried restarted the start-dfs script with this command: bash /usr/local/hadoop/sbin/

It did not help. You ran "jps" to see if Resource Manager was running. What should you do?

Restart the Yarn script. Run a command like this:

bash /usr/local/hadoop/sbin/

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