Hi, The reduce tasks are threads that are launched by the Reducer. The print below shows the stacktrace of one reduce task.
at org.apache.hadoop.mapred.ReduceTask$ReduceCopier.fetchHashesOutputs(ReduceTask.java:2582) at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:395) at org.apache.hadoop.mapred.Child.main(Child.java:194) I would like to debug this thread in a IDE but I don't know how to do it. Should I define properties to do this? Is there a way to do it? Thanks -- PSC
