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hadoop classpath -libjars and setJarByClass()

 
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Do we need both -libjars and setJarByClass() to set the proper classpath for tasks or either would do?

If the driver and MR code are all in the same jar and assuming there is no third party dependency (other than hadoop framework) do we still need to set jars in class path using libjars or setJarByClass()?


 
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