Aleksandar Stojadinovic created SPARK-5953:
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Summary: NoSuchMethodException with a Kafka input stream and
custom decoder in Scala
Key: SPARK-5953
URL: https://issues.apache.org/jira/browse/SPARK-5953
Project: Spark
Issue Type: Bug
Components: Input/Output, Spark Core
Affects Versions: 1.2.1, 1.2.0
Environment: Xubuntu 14.04, Kafka 0.8.2, Scala 2.10.4, Scala 2.11.5
Reporter: Aleksandar Stojadinovic
When using a Kafka input stream, and setting a custom Kafka Decoder, Spark
throws an exception upon starting:
{noformat}
ERROR ReceiverTracker: Deregistered receiver for stream 0: Error starting
receiver 0 - java.lang.NoSuchMethodException:
UserLocationEventDecoder.<init>(kafka.utils.VerifiableProperties)
at java.lang.Class.getConstructor0(Class.java:2971)
at java.lang.Class.getConstructor(Class.java:1812)
at
org.apache.spark.streaming.kafka.KafkaReceiver.onStart(KafkaInputDStream.scala:106)
at
org.apache.spark.streaming.receiver.ReceiverSupervisor.startReceiver(ReceiverSupervisor.scala:121)
at
org.apache.spark.streaming.receiver.ReceiverSupervisor.start(ReceiverSupervisor.scala:106)
at
org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverLauncher$$anonfun$8.apply(ReceiverTracker.scala:277)
at
org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverLauncher$$anonfun$8.apply(ReceiverTracker.scala:269)
at
org.apache.spark.SparkContext$$anonfun$runJob$4.apply(SparkContext.scala:1314)
at
org.apache.spark.SparkContext$$anonfun$runJob$4.apply(SparkContext.scala:1314)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:61)
at org.apache.spark.scheduler.Task.run(Task.scala:56)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:196)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
15/02/23 21:37:31 ERROR ReceiverSupervisorImpl: Stopped executor with error:
java.lang.NoSuchMethodException:
UserLocationEventDecoder.<init>(kafka.utils.VerifiableProperties)
15/02/23 21:37:31 ERROR Executor: Exception in task 0.0 in stage 0.0 (TID 0)
java.lang.NoSuchMethodException:
UserLocationEventDecoder.<init>(kafka.utils.VerifiableProperties)
at java.lang.Class.getConstructor0(Class.java:2971)
at java.lang.Class.getConstructor(Class.java:1812)
at
org.apache.spark.streaming.kafka.KafkaReceiver.onStart(KafkaInputDStream.scala:106)
at
org.apache.spark.streaming.receiver.ReceiverSupervisor.startReceiver(ReceiverSupervisor.scala:121)
at
org.apache.spark.streaming.receiver.ReceiverSupervisor.start(ReceiverSupervisor.scala:106)
at
org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverLauncher$$anonfun$8.apply(ReceiverTracker.scala:277)
at
org.apache.spark.streaming.scheduler.ReceiverTracker$ReceiverLauncher$$anonfun$8.apply(ReceiverTracker.scala:269)
at
org.apache.spark.SparkContext$$anonfun$runJob$4.apply(SparkContext.scala:1314)
at
org.apache.spark.SparkContext$$anonfun$runJob$4.apply(SparkContext.scala:1314)
at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:61)
at org.apache.spark.scheduler.Task.run(Task.scala:56)
at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:196)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
{noformat}
The stream is initialized with:
{code:title=Bar.java|borderStyle=solid}
val locationsAndKeys = KafkaUtils.createStream[String, Array[Byte],
kafka.serializer.StringDecoder, UserLocationEventDecoder] (ssc, kafkaParams,
topicMap, StorageLevel.MEMORY_AND_DISK);
{code}
The decoder:
{code:title=Bar.java|borderStyle=solid}
import kafka.serializer.Decoder
class UserLocationEventDecoder extends Decoder[UserLocationEvent] {
val kryo = new Kryo()
override def fromBytes(bytes: Array[Byte]): UserLocationEvent = {
val input: Input = new Input(new ByteArrayInputStream(bytes))
val userLocationEvent: UserLocationEvent =
kryo.readClassAndObject(input).asInstanceOf[UserLocationEvent]
input.close()
return userLocationEvent
}
}
{code}
The input stream (and my code overall) works fine if initialized with the
kafka.serializer.DefaultDecoder, and content is manually deserialized.
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