I want to fix a limit for the number of running mapper per mapreduce job, I set the following parameter in my mapred-site.xml file <name>mapreduce.job.running.map.limit</name> <value>25000</value> But it seems that this parameter has no effect. I found a job which takes 44543 mappers and in the configuration file i found the right parameter with the rigth value (25000). Is there another parameter to activate this limit? ... View more