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Can not track swap usage of a task in map reduce?

Question asked by reihane on Oct 27, 2013
Latest reply on Oct 28, 2013 by yufeldman
I am working with mapreduce program. In one of my steps map become %100 and then reduce starts from %72. the reduce becomes 100 but it doesn't become complete. There is only a Warn in the taktracker log:

    WARN org.apache.hadoop.mapreduce.util.ProcfsBasedProcessTree: /proc/<pid>/status does not have information about swap space used(VmSwap). Can not track swap usage of a task

What is this? What can i do to solve it?