19/01/03 15:30:54 ERROR StreamingContext: 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:233)
at org.apache.spark.streaming.DStreamGraph.validate(DStreamGraph.scala:161)
at org.apache.spark.streaming.StreamingContext.validate(StreamingContext.scala:542)
at org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:601)
at org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:600)
at SparkStreamingAndKafka$.main(SparkStreamingAndKafka.scala:55)
at SparkStreamingAndKafka.main(SparkStreamingAndKafka.scala)
Exception in thread "main" java.lang.IllegalArgumentException: requirement failed: No output operations registered, so nothing to execute
at scala.Predef$.require(Predef.scala:233)
at org.apache.spark.streaming.DStreamGraph.validate(DStreamGraph.scala:161)
at org.apache.spark.streaming.StreamingContext.validate(StreamingContext.scala:542)
at org.apache.spark.streaming.StreamingContext.liftedTree1$1(StreamingContext.scala:601)
at org.apache.spark.streaming.StreamingContext.start(StreamingContext.scala:600)
at SparkStreamingAndKafka$.main(SparkStreamingAndKafka.scala:55)
at SparkStreamingAndKafka.main(SparkStreamingAndKafka.scala)
解决原因:没有触发DStream需要的aciton
解决方法:使用以下方法之一触发:
print()
foreachRDD()
saveAsObjectFiles()
saveAsTextFiles()
saveAsHadoopFiles()
这个是kafka receiver出的错