Affects Version/s: 0.20.1, 0.21.0
Fix Version/s: None
addArchiveToClassPath is a method of DistributedCache class. It should be called before running a task. It accepts path to a jar file on a DFS. After it
this method should put this jar file on sitribuuted cache and than add this file to classpath to each map/reduce process on job tracker.
This method don't work:
in TaskRunner there is an algorithm that looks for correspondence between DFS paths and local paths in distributed cache.