Apache Spark broadcast error: Error sending message as driverActor is null [message = UpdateBlockInfo(BlockManagerId(4)

HiI'm using Apache Spark 1.1.0 and I'm currently having issue with broadcast method. So when I call broadcast function on a small dataset to a 5 nodes cluster, I experiencing the Error sending message as driverActor is null after broadcast the variables several times (apps running under jboss). 

Apache Spark broadcast error: Error sending message as driverActor is null [message = UpdateBlockInfo(BlockManagerId

I'm using Apache Spark 1.1.0 and I'm currently having issue with broadcast method. So when I call broadcast function on a small dataset to a 5 nodes cluster, I experiencing the Error sending message as driverActor is null after broadcast the variables several times (apps running under jboss). Any