error with spark: Received -1 when reading from channel, socket has likely been closed. what does it mean? - apache-spark

Question

I am running a Kafka server. (when i use the command bin/kafka-console-consumer.sh --zookeeper localhost:2181 --topic test --from-beginning it gives me all ma data in my topic).
When I want to test the example JavaDirectKafkaWordCount in spark in order to understand how it works i get the following error:
$ ./run-example streaming.JavaDirectKafkaWordCount localhost:2181 test
Using Spark's default log4j profile: org/apache/spark/log4j-defaults.properties
16/08/17 11:19:33 INFO StreamingExamples: Setting log level to [WARN] for streaming example. To override add a custom log4j.properties to the classpath.
16/08/17 11:19:33 WARN NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
16/08/17 11:19:33 WARN Utils: Your hostname, localhost.localdomain resolves to a loopback address: 127.0.0.1; using 10.66.212.132 instead (on interface enp5s0)
16/08/17 11:19:33 WARN Utils: Set SPARK_LOCAL_IP if you need to bind to another address
Exception in thread "main" org.apache.spark.SparkException: java.io.EOFException: Received -1 when reading from channel, socket has likely been closed.
at org.apache.spark.streaming.kafka.KafkaCluster$$anonfun$checkErrors$1.apply(KafkaCluster.scala:366)
at org.apache.spark.streaming.kafka.KafkaCluster$$anonfun$checkErrors$1.apply(KafkaCluster.scala:366)
at scala.util.Either.fold(Either.scala:97)
at org.apache.spark.streaming.kafka.KafkaCluster$.checkErrors(KafkaCluster.scala:365)
at org.apache.spark.streaming.kafka.KafkaUtils$.getFromOffsets(KafkaUtils.scala:222)
at org.apache.spark.streaming.kafka.KafkaUtils$.createDirectStream(KafkaUtils.scala:484)
at org.apache.spark.streaming.kafka.KafkaUtils$.createDirectStream(KafkaUtils.scala:607)
at org.apache.spark.streaming.kafka.KafkaUtils.createDirectStream(KafkaUtils.scala)
at org.apache.spark.examples.streaming.JavaDirectKafkaWordCount.main(JavaDirectKafkaWordCount.java:71)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:497)
at org.apache.spark.deploy.SparkSubmit$.org$apache$spark$deploy$SparkSubmit$$runMain(SparkSubmit.scala:731)
at org.apache.spark.deploy.SparkSubmit$.doRunMain$1(SparkSubmit.scala:181)
at org.apache.spark.deploy.SparkSubmit$.submit(SparkSubmit.scala:206)
at org.apache.spark.deploy.SparkSubmit$.main(SparkSubmit.scala:121)
at org.apache.spark.deploy.SparkSubmit.main(SparkSubmit.scala)
I would like to know what the error means and how i could possible solve it.
Thank you very much for your attention and your help.
Joe