java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at org.apache.spark.SparkContext.(SparkContext.scala:583)
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
at sparkapi.Handler.handleMethodCall(handler.scala:139)
at sparkapi.Handler.channelRead0(handler.scala:63)
at sparkapi.Handler.channelRead0(handler.scala:15)
at io.netty.channel.SimpleChannelInboundHandler.channelRead(SimpleChannelInboundHandler.java:105)
at io.netty.channel.AbstractChannelHandlerContext.invokeChannelRead(AbstractChannelHandlerContext.java:308)
at io.netty.channel.AbstractChannelHandlerContext.fireChannelRead(AbstractChannelHandlerContext.java:294)

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