Hello Folks:
I'm running into following error while executing relatively straight
forward spark-streaming code. Am I missing anything?
*Exception in thread "main" java.lang.AssertionError: assertion failed: No
output streams registered, so nothing to execute*
Code:
val conf = new SparkConf().setMaster("local[2]").setAppName("Streams")
val ssc = new StreamingContext(conf, Seconds(1))
val kafkaStream = {
val sparkStreamingConsumerGroup = "spark-streaming-consumer-group"
val kafkaParams = Map(
"zookeeper.connect" -> "node1.c.emerald-skill-783.internal:2181",
"group.id" -> "twitter",
"zookeeper.connection.timeout.ms" -> "1000")
val inputTopic = "twitter"
val numPartitionsOfInputTopic = 2
val streams = (1 to numPartitionsOfInputTopic) map { _ =>
KafkaUtils.createStream(ssc, kafkaParams, Map(inputTopic -> 1),
StorageLevel.MEMORY_ONLY_SER)
}
val unifiedStream = ssc.union(streams)
val sparkProcessingParallelism = 1
unifiedStream.repartition(sparkProcessingParallelism)
}
//print(kafkaStream)
ssc.start()
ssc.awaitTermination()
--
Rohit Pujari
--
CONFIDENTIALITY NOTICE
NOTICE: This message is intended for the use of the individual or entity to
which it is addressed and may contain information that is confidential,
privileged and exempt from disclosure under applicable law. If the reader
of this message is not the intended recipient, you are hereby notified that
any printing, copying, dissemination, distribution, disclosure or
forwarding of this communication is strictly prohibited. If you have
received this communication in error, please contact the sender immediately
and delete it from your system. Thank You.
