找不到org.apache.spark.streaming.flume.sink.SparkFlumeProtocol$Callback

java.lang.NoClassDefFoundError: org/apache/spark/streaming/flume/sink/SparkFlumeProtocol$Callback
at org.apache.spark.streaming.flume.FlumePollingReceiver$$anonfun$onStart$1.apply(FlumePollingInputDStream.scala:84)
at org.apache.spark.streaming.flume.FlumePollingReceiver$$anonfun$onStart$1.apply(FlumePollingInputDStream.scala:82)
at scala.collection.IndexedSeqOptimized$class.foreach(IndexedSeqOptimized.scala:33)
at scala.collection.mutable.WrappedArray.foreach(WrappedArray.scala:34)
at org.apache.spark.streaming.flume.FlumePollingReceiver.onStart(FlumePollingInputDStream.scala:82)
at org.apache.spark.streaming.receiver.ReceiverSupervisor.startReceiver(ReceiverSupervisor.scala:148)
at org.apache.spark.streaming.receiver.ReceiverSupervisor.start(ReceiverSupervisor.scala:130)
at org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:542)
at org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverTrackerEndpoint$$anonfun$9.apply(ReceiverTracker.scala:532)
at org.apache.spark.SparkContext$$anonfun$37.apply(SparkContext.scala:1984)
at org.apache.spark.SparkContext$$anonfun$37.apply(SparkContext.scala:1984)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:66)
at org.apache.spark.scheduler.Task.run(Task.scala:88)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:214)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: org.apache.spark.streaming.flume.sink.SparkFlumeProtocol$Callback
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)

如果找不到org.apache.spark.streaming.flume.sink.SparkFlumeProtocol$Callback这个类。

这个类属于spark-streaming-flume-sink_2.10.jar

   <dependency>
        <groupId>org.apache.spark</groupId>
        <artifactId>spark-streaming-flume-sink_2.10</artifactId>
        <version>1.5.2</version>
    </dependency>