Hello,
I have mappers that do not need much ram but combiners and reducers need a lot. Is it possible to set different VM parameters for mappers and reducers? PS Often I face interesting problem, on same set of data I recieve I have java.lang.OutOfMemoryError: Java heap space in combiner but it happens not all the time. What could be cause of such behavior? My personal opinion is that I have mapred.job.reuse.jvm.num.tasks=-1 and jvm GC doesn't always start when it should. Thanks in Advance, Vitaliy S
