Hi, I've look to the hadoop-0.20.1 source and I've the following questions:
1 - As I understand from the source code, LocalJobRunner is a class used to run a map or reduce task. But a MR task is launched by the class JvmTask. What's the difference between the MR from the LocalJobRunner and from the JvmTask? 2 - What's the purpose of the class org.apache.hadoop.mapred.Maptask? What the difference between this class and TaskInProgress class? Regards -- PSC
