Spark job on Standalone cluster is Stuck, shows no logs after "util.AkkaUtils: Connecting to HeartbeatReceiver" on worker nodes and "storage.BlockmanagerInfo: Added broadcast..." on client driver side.

Would be great, if you could clarify any of these ( or better all of these :)
1. Did anyone see similar issue? or any clues on what could be the reason?
2. How do you i increase debug or log level? to see whats actually happening?
3. Any clues or links on how to use kerborised Hbase in spark standalone?