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Default values in mapred-site.xml

Question asked by sathvik on Aug 11, 2013
Latest reply on Aug 11, 2013 by sathvik
Hi All,

I am new to MapR environment and have beginner knowledge in Hadoop.
There are few properties in mapred-site.xml  which are blank few others are pointing to log file

Properties which are blank:,mapred.job.reduce.memory.physical.mb

Property pointing to the log file: = -XX:ErrorFile=/opt/cores/mapreduce_java_error%p.log

what does it mean?

ALso what is the default value for blank values and how I can determine the blank values (any env variables)

Thanks for your valuable time