streaming error

[zhengfeitian]

2018-07-03 09:43:54 ERROR StreamingContext:91 - Error starting the context, marking it as stopped java.lang.IllegalArgumentException: requirement failed: No output operations registered, so nothing to execute at scala.Predef$.require(Predef.scala:224) at org.apache.spark.streaming.DStreamGraph.validate(DStreamGraph.scala:168) at org.apache.spark.streaming.StreamingContext.validate(StreamingContext.scala:513) at org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:573) at org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:572) at org.apache.spark.streaming.api.java.JavaStreamingContext.start(JavaStreamingContext.scala:556) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at py4j.reflection.MethodInvoker.invoke(MethodInvoker.java:244) at py4j.reflection.ReflectionEngine.invoke(ReflectionEngine.java:357) at py4j.Gateway.invoke(Gateway.java:282) at py4j.commands.AbstractCommand.invokeMethod(AbstractCommand.java:132) at py4j.commands.CallCommand.execute(CallCommand.java:79) at py4j.GatewayConnection.run(GatewayConnection.java:238) at java.lang.Thread.run(Thread.java:748)

[Crysple]

No output operations registered, so nothing to execute 就是每个BATCH处理完之后没有什么代码操作，所以就不执行了，要在处理完DSTREAM之后写点PRINT或者WRITE操作