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Why did ResourceManager and NodeManager suddenly stop working?

Question asked by pkhnkn on Feb 15, 2017
Latest reply on Feb 20, 2017 by jamesrgrinter

Hello,

i´m using the MapR Sandbox. Though i didn´t change anything, in the last few days, suddenly my resourcemanager and nodemanager stopped working.

 

This happens when i try to start spark shell, which gives me this error message:

17/02/15 00:57:55 WARN ZKDataRetrieval: Can not get children of /services/resourcemanager/master with error: KeeperErrorCode = NoNode for /services/resourcemanager/master
17/02/15 00:57:55 ERROR MapRZKRMFinderUtils: Unable to determine ResourceManager service address from Zookeeper at maprdemo:5181
17/02/15 00:57:55 ERROR MapRZKBasedRMFailoverProxyProvider: Unable to create proxy to the ResourceManager maprdemo/192.168.150.132:8032
17/02/15 00:57:55 ERROR SparkContext: Error initializing SparkContext.
java.lang.RuntimeException: Unable to create proxy to the ResourceManager maprdemo/192.168.150.132:8032

 

MCS gives these error messages:

Can not determine if service: resourcemanager is running. Check logs at: /opt/mapr/hadoop/hadoop-2.7.0/logs/

Can not determine if service: nodemanager is running. Check logs at: /opt/mapr/hadoop/hadoop-2.7.0/logs/

 

 

Why did they stop working? How can i fix it? I checked the log files, but i´m not sure which ones i should read and how to interprete them. I also had the same problems some weeks ago. I fixed it by just reinstalling the sandbox, but that´s not what i want to do everytime this problems occurs.

 

Thanks in advance for any help!

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