Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected.
2015-05-01 15:17:24,316 INFO [TaskHeartbeatHandler PingChecker] org.apache.hadoop.mapreduce.v2.app.TaskHeartbeatHandler: TaskHeartbeatHandler thread interrupted
2015-05-01 15:17:24,318 INFO [IPC Server Responder] org.apache.hadoop.ipc.Server: Stopping IPC Server Responder