Hi,
I have some quick/dirty code here running in Spark 1.0.0 (CDH 5.1,
Spark in Yarn cluster mode)
import org.apache.spark.streaming.StreamingContext
import org.apache.spark.streaming.StreamingContext._
import org.apache.spark.streaming.Seconds
import org.apache.spark.streaming.kafka._
import kafka.producer._
import java.util.Properties
def toKafka(str: String) {
val props = new Properties()
props.put("metadata.broker.list", "host1:9092,host2:902")
props.put("serializer.class", "kafka.serializer.StringEncoder")
props.put("producer.type", "async")
props.put("request.required.acks", "1")
val topic = "normstruct"
val config = new ProducerConfig(props)
val producer = new Producer[String, String](config)
val kOutMsg = new KeyedMessage[String,String](topic,str)
producer.send(kOutMsg)
}
val ssc = new StreamingContext(sc,Seconds(5))
val kInMsg =
KafkaUtils.createStream(ssc,"zkhost1:2181/zk_kafka","normApp",Map("rawunstruct"
-> 1))
kInMsg.foreach(rdd => { rdd.foreach(e => toKafka(e._2)) })
ssc.start()
Throws:
14/08/12 00:47:25 INFO DAGScheduler: Failed to run foreach at <console>:31
14/08/12 00:47:25 ERROR JobScheduler: Error running job streaming job
1407804445000 ms.0
org.apache.spark.SparkException: Job aborted due to stage failure:
Task not serializable: java.io.NotSerializableException:
org.apache.spark.streaming.StreamingContext
at
org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$failJobAndIndependentStages(DAGScheduler.scala:1033)
at
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1017)
at
org.apache.spark.scheduler.DAGScheduler$$anonfun$abortStage$1.apply(DAGScheduler.scala:1015)
at
scala.collection.mutable.ResizableArray$class.foreach(ResizableArray.scala:59)
at scala.collection.mutable.ArrayBuffer.foreach(ArrayBuffer.scala:47)
at org.apache.spark.scheduler.DAGScheduler.abortStage(DAGScheduler.scala:1015)
at
org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitMissingTasks(DAGScheduler.scala:770)
at
org.apache.spark.scheduler.DAGScheduler.org$apache$spark$scheduler$DAGScheduler$$submitStage(DAGScheduler.scala:713)
at
org.apache.spark.scheduler.DAGScheduler.handleJobSubmitted(DAGScheduler.scala:697)
at
org.apache.spark.scheduler.DAGSchedulerEventProcessActor$$anonfun$receive$2.applyOrElse(DAGScheduler.scala:1176)
at akka.actor.ActorCell.receiveMessage(ActorCell.scala:498)
at akka.actor.ActorCell.invoke(ActorCell.scala:456)
at akka.dispatch.Mailbox.processMailbox(Mailbox.scala:237)
at akka.dispatch.Mailbox.run(Mailbox.scala:219)
at
akka.dispatch.ForkJoinExecutorConfigurator$AkkaForkJoinTask.exec(AbstractDispatcher.scala:386)
at scala.concurrent.forkjoin.ForkJoinTask.doExec(ForkJoinTask.java:260)
at
scala.concurrent.forkjoin.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1339)
at scala.concurrent.forkjoin.ForkJoinPool.runWorker(ForkJoinPool.java:1979)
at
scala.concurrent.forkjoin.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:107)
14/08/12 00:47:25 INFO ShuffleBlockManager: Could not find files for
shuffle 0 for deleting
14/08/12 00:47:25 INFO ContextCleaner: Cleaned shuffle 0
Thanks,
Xuri
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