Question

出于某种原因，如果我包含一个Twitter接收器并启动流式上下文，我得到以下异常，不知道为什么如果有人已经遇到过这个问题，或者我做错了什么，有人可以告诉我吗？

java.lang.ArithmeticException: / by zero 
        at org.apache.spark.streaming.Duration.isMultipleOf(Duration.scala:59) 
        at org.apache.spark.streaming.dstream.DStream.isTimeValid(DStream.scala:324) 
        at org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:344) 
        at org.apache.spark.streaming.dstream.DStream$$anonfun$getOrCompute$1.apply(DStream.scala:344) 
        at scala.Option.orElse(Option.scala:257) 
        at org.apache.spark.streaming.dstream.DStream.getOrCompute(DStream.scala:341) 
        at org.apache.spark.streaming.dstream.ForEachDStream.generateJob(ForEachDStream.scala:47) 
        at org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:115) 
        at org.apache.spark.streaming.DStreamGraph$$anonfun$1.apply(DStreamGraph.scala:114) 
        at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251) 
        at scala.collection.TraversableLike$$anonfun$flatMap$1.apply(TraversableLike.scala:251) 
        at scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59) 
        at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47) 
        at scala.collection.TraversableLike$class.flatMap(TraversableLike.scala:251) 
        at scala.collection.AbstractTraversable.flatMap(Traversable.scala:105) 
        at org.apache.spark.streaming.DStreamGraph.generateJobs(DStreamGraph.scala:114) 
        at org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$3.apply(JobGenerator.scala:248) 
        at org.apache.spark.streaming.scheduler.JobGenerator$$anonfun$3.apply(JobGenerator.scala:246) 
        at scala.util.Try$.apply(Try.scala:161) 
        at org.apache.spark.streaming.scheduler.JobGenerator.generateJobs(JobGenerator.scala:246) 
        at org.apache.spark.streaming.scheduler.JobGenerator.org$apache$spark$streaming$scheduler$JobGenerator$$processEvent(JobGenerator.scala:181) 
        at org.apache.spark.streaming.scheduler.JobGenerator$$anon$1.onReceive(JobGenerator.scala:87) 
        at org.apache.spark.streaming.scheduler.JobGenerator$$anon$1.onReceive(JobGenerator.scala:86) 
        at org.apache.spark.util.EventLoop$$anon$1.run(EventLoop.scala:48) 
2016-03-28 10:08:00,112 ERROR [DefaultQuartzScheduler_Worker-8] org.quartz.core.JobRunShell 
Job sample_TwitterListener.SocialMedia_sample threw an unhandled Exception:

Answer 1

最后发现问题是什么，在代码中我正在初始化流上的两个窗口，如下所示

JavaReceiverInputDStream<Status> inputStream = TwitterUtils.createStream(jssc, getAuth());
JavaDStream<String> batchedInput = rawInput.window(new Duration(windowInterval), new Duration(slideInterval));
processStreamData(batchedInput);

private void processStreamData(JavaDStream<String> _input) {
    JavaDStream<String> input = _input.window(new Duration(windowInterval), new Duration(slideInterval));
}

因此，第一个窗口流用于获得正确的滑动间隔，但不知何故，第二个窗口的滑动间隔为0毫秒，这导致/零异常。删除第二个窗口操作后，我能够收到推特数据。

Twitter接收器没有在spark 1.6.0中运行

1 个答案: