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  1. ,
    Expert tip

    Check if you didn't forget to instantiate your topic in the kafka broker.

  2. ,

    This error comes up in the old version of spring-test , you should update tospring test 4.3.2

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com/google/common/uti l/concurrent/ThreadFactoryBuilder
java.lang.ClassNotFoundException:	at$	at$	at Method)	at	at java.lang.ClassLoader.loadClass(	at sun.misc.Launcher$AppClassLoader.loadClass(	at java.lang.ClassLoader.loadClass(	at org.apache.spark.util.Utils$.(Utils.scala:636)	at org.apache.spark.util.Utils$.(Utils.scala)	at org.apache.spark.repl.SparkILoop.(SparkILoop.scala:134)	at org.apache.spark.repl.SparkILoop.(SparkILoop.scala:65)	at org.apache.spark.repl.Main$.main(Main.scala:30)	at org.apache.spark.repl.Main.main(Main.scala)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(	at sun.reflect.DelegatingMethodAccessorImpl.invoke(	at java.lang.reflect.Method.invoke(	at org.apache.spark.deploy.SparkSubmit$.launch(SparkSubmit.scala:317)	at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:73)	at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)