[ https://issues.apache.org/jira/browse/SPARK-21431?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Sean Owen reopened SPARK-21431: ------------------------------- > Unable to parallelize a list in Scala > ------------------------------------- > > Key: SPARK-21431 > URL: https://issues.apache.org/jira/browse/SPARK-21431 > Project: Spark > Issue Type: Task > Components: Spark Submit, Structured Streaming > Affects Versions: 2.1.0 > Reporter: Mounika > > I am using RabbitMQ spark streaming connector to process AVRO messages and I > am unable to parallelize a list in scala, getting > java.lang.NullPointerException. The same worked when I was using Kafka spark > connector > messages.foreachRDD( rdd => { > for(avroLine <- rdd){ > val record = Injection.injection.invert(avroLine.getBytes).get > val field1Value = record.get("username") > val jsonStrings=Seq(record.toString()) > val newRow = > sqlContext.sparkContext.parallelize(Seq(record.toString())) > } > }) > Output: jsonStrings...List({"username": "user_118", "tweet": "tweet_218", > "timestamp": 18}) > Exception: > Caused by: java.lang.NullPointerException > at > com.capitalone.AvroConsumer$$anonfun$main$1$$anonfun$apply$1.apply(AvroConsumer.scala:83) > at > com.capitalone.AvroConsumer$$anonfun$main$1$$anonfun$apply$1.apply(AvroConsumer.scala:74) > at scala.collection.Iterator$class.foreach(Iterator.scala:893) > at > org.apache.spark.util.CompletionIterator.foreach(CompletionIterator.scala:26) > at > org.apache.spark.rdd.RDD$$anonfun$foreach$1$$anonfun$apply$28.apply(RDD.scala:917) > at > org.apache.spark.rdd.RDD$$anonfun$foreach$1$$anonfun$apply$28.apply(RDD.scala:917) > at > org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1944) > at > org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1944) > at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87) > at org.apache.spark.scheduler.Task.run(Task.scala:99) > at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:282) > 17/07/16 19:11:00 WARN TaskSetManager: Lost task 0.0 in stage 47.0 (TID 47, > localhost, executor driver): java.lang.NullPointerException > at > com.capitalone.AVROMqStreaming$$anonfun$main$1$$anonfun$apply$1.apply(AVROMqStreaming.scala:56) > at > com.capitalone.AVROMqStreaming$$anonfun$main$1$$anonfun$apply$1.apply(AVROMqStreaming.scala:46) > at scala.collection.Iterator$class.foreach(Iterator.scala:893) > at > org.apache.spark.util.CompletionIterator.foreach(CompletionIterator.scala:26) > at > org.apache.spark.rdd.RDD$$anonfun$foreach$1$$anonfun$apply$28.apply(RDD.scala:917) > at > org.apache.spark.rdd.RDD$$anonfun$foreach$1$$anonfun$apply$28.apply(RDD.scala:917) > at > org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1944) > at > org.apache.spark.SparkContext$$anonfun$runJob$5.apply(SparkContext.scala:1944) > at org.apache.spark.scheduler.ResultTask.runTask(ResultTask.scala:87) > at org.apache.spark.scheduler.Task.run(Task.scala:99) > at org.apache.spark.executor.Executor$TaskRunner.run(Executor.scala:282) > 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) > Thanks in Advance!! -- This message was sent by Atlassian JIRA (v6.4.14#64029) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-unsubscr...@spark.apache.org For additional commands, e-mail: issues-h...@spark.apache.org