Add the default mapreduce.shuffle.port property to mapred-default.xml
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Key: MAPREDUCE-3493
URL: https://issues.apache.org/jira/browse/MAPREDUCE-3493
Project: Hadoop Map/Reduce
Issue Type: Bug
Reporter: Ahmed Radwan
Assignee: Ahmed Radwan
Priority: Minor
I faced this issue when trying to run multiple Hadoop MR2 instances on the same
node. The default value for this property is hardcoded in the
ShuffleHandler.java class so it results in port conflicts. The issue is
resolved if you set the property value in your conf files. But the absence of
this property from *-default.xml files is confusing. So It'll be cleaner to
move this property to mapred-default.xml, so its default value can be easily
identified and changed if needed.
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