* #62 - Added a Force copy flag in case the hadoop cluster is version 2*...


* #62 - Adding an optional -f flag to hadoop copy commands in case of hadoop2 clusters.
* #67 - Added retries while updating the job to status running after successful launch.
* Changed scripts to create a sample cluster with version 2.4.0.
I would update the PersistanceManager to add retries (which is a reasonable feature to have). And then you can just invoke that from here. Otherwise you will most likely have to repeat this code everywhere you want retries. Also for consistency, if you are going to support retries for DB calls, you may as well use it across the board.