YARN NodeManager Failed to Start

I upgraded my CDH, one of my NodeNamager cannot be brought up.
NullPointer Exceptions were found in error log:

I tried deleting all ZooKeeper-related configs(which you can find it from Manually Upgrade CDH 5.2 in CM 5, exact the YARN part), not working.
Deleted the NodeManager instance and then reinstall, same.

Many ‘Recovering application’ and ‘Recovering localized resource’ were found in that log file:

Deleted those, still failed.

And, in the start-up message part,

‘/tmp/hadoop-yarn/’ were read every on starting.
The solution is, stop the instance, delete ‘/tmp/hadoop-yarn/’ from local filesystem, start the instance.

YARN NodeManager Failed to Start by @sskaje: https://sskaje.me/2014/11/yarn-nodemanager-failed-start/

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