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From mahendra <mahendra00...@gmail.com>
Subject Integrating Kafka 0.10 or higher with Spark 2.1.1 -- required jars
Date Fri, 07 Jul 2017 12:49:39 GMT
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 



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