IPC Server ports - how to set the range?

[#1]

Is it possible to set range of IPC Server listener ports? I can see in my MR jobs that the ports being used vary from sth like 36000 up to 45000. Is this configurable anywhere in Ambari? I am currently playing with ambari with datanodes running on vagrant vms, I need to setup ports forwarding..

[#2 · Accepted solution]

I think I've found the answer: yarn.app.mapreduce.am.job.client.port-range this is a setting inside mapred-site.xml that does the job. You can refer to the details directly here: https://hadoop.apache.org/docs/r2.7.3/hadoop-mapreduce-client/hadoop-mapreduce-client-core/mapred-de...