Hi,

   After finding that support for streaming api in python is not present for kafka brokers version > 0.10 . I was trying to run a kafka example in scala. I used following spark submit command :

/usr/local/spark/bin/spark-submit --jars /home/mahendra/spark-streaming-kafka-0-10_2.11-2.1.1.jar,/home/mahendra/spark-streaming-kafka-0-10-assembly_2.11-2.1.1.jar --class org.apache.spark.examples.streaming.KafkaWordCount /usr/local/spark/examples/jars/spark-examples_2.11-2.1.1.jar 10.0.16.96:2181 group_test streams 6
 
Basically I'm trying to include jars : spark-streaming-kafka-0-10_2.11-2.1.1.jar, spark-streaming-kafka-0-10-assembly_2.11-2.1.1.jar

But it throws this exception :

Exception in thread "main" java.lang.NoClassDefFoundError: kafka/serializer/StringDecoder
at org.apache.spark.streaming.kafka.KafkaUtils$.createStream(KafkaUtils.scala:66)
at org.apache.spark.examples.streaming.KafkaWordCount$.main(KafkaWordCount.scala:57)
at org.apache.spark.examples.streaming.KafkaWordCount.main(KafkaWordCount.scala)
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 org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:743)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:187)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:212)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:126)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
Caused by: java.lang.ClassNotFoundException: kafka.serializer.StringDecoder
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 12 more

Any idea if I have missed some related jars ?

Thanks,
Mahendra