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 /0.0.0.0:8032
2020-12-20 18:19:36,068 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:8032. 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/start-dfs.sh
It did not help. You ran "jps" to see if Resource Manager was running. What should you do?
Solution
Restart the Yarn script. Run a command like this:
bash /usr/local/hadoop/sbin/start-yarn.sh