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RackResolver floods with log messages

RackResolver floods with log messages

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I have a Yarn+Spark cluster installed with Ambari (2.6.3.0-235). Upon this cluster I run Jupyter Notebook as a service.

On a notebook, I connect to Spark using findSpark , I am getting a flood of error messages in the log:

jupyter[1057]: [dispatcher-event-loop-1] INFO org.apache.hadoop.yarn.util.RackResolver - Resolved <machine-ip> to /default-rack

I found this Jira task discussing exactly this problem, but I am not sure what is the easiest way to update this.

Is there any log4j file I can just update to disable RackResolver messages to notebooks?