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https://issues.apache.org/jira/browse/BEAM-2029?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15987828#comment-15987828
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ASF GitHub Bot commented on BEAM-2029:
--------------------------------------
Github user asfgit closed the pull request at:
https://github.com/apache/beam/pull/2746
> NullPointerException when using multi output ParDo in Spark runner in
> streaming mode.
> -------------------------------------------------------------------------------------
>
> Key: BEAM-2029
> URL: https://issues.apache.org/jira/browse/BEAM-2029
> Project: Beam
> Issue Type: Bug
> Components: runner-spark
> Reporter: Etienne Chauchot
> Assignee: Aviem Zur
> Fix For: First stable release
>
>
> Behavior:
> {{context.borrowDataset(transform)}} returns null.
> stackTrace
> {code}
> 17/04/20 15:00:58 INFO org.apache.beam.runners.spark.SparkRunner$Evaluator:
> Evaluating GroupByKey
> Exception in thread "main" java.lang.NullPointerException
> at
> org.apache.beam.runners.spark.translation.streaming.StreamingTransformTranslator$6.evaluate(StreamingTransformTranslator.java:272)
> at
> org.apache.beam.runners.spark.translation.streaming.StreamingTransformTranslator$6.evaluate(StreamingTransformTranslator.java:267)
> at
> org.apache.beam.runners.spark.SparkRunner$Evaluator.doVisitTransform(SparkRunner.java:409)
> at
> org.apache.beam.runners.spark.SparkRunner$Evaluator.visitPrimitiveTransform(SparkRunner.java:395)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:488)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.visit(TransformHierarchy.java:483)
> at
> org.apache.beam.sdk.runners.TransformHierarchy$Node.access$400(TransformHierarchy.java:232)
> at
> org.apache.beam.sdk.runners.TransformHierarchy.visit(TransformHierarchy.java:207)
> at org.apache.beam.sdk.Pipeline.traverseTopologically(Pipeline.java:384)
> at
> org.apache.beam.runners.spark.translation.streaming.SparkRunnerStreamingContextFactory.call(SparkRunnerStreamingContextFactory.java:88)
> at
> org.apache.beam.runners.spark.translation.streaming.SparkRunnerStreamingContextFactory.call(SparkRunnerStreamingContextFactory.java:47)
> at
> org.apache.spark.streaming.api.java.JavaStreamingContext$$anonfun$10.apply(JavaStreamingContext.scala:776)
> at
> org.apache.spark.streaming.api.java.JavaStreamingContext$$anonfun$10.apply(JavaStreamingContext.scala:775)
> at scala.Option.getOrElse(Option.scala:120)
> at
> org.apache.spark.streaming.StreamingContext$.getOrCreate(StreamingContext.scala:864)
> at
> org.apache.spark.streaming.api.java.JavaStreamingContext$.getOrCreate(JavaStreamingContext.scala:775)
> at
> org.apache.spark.streaming.api.java.JavaStreamingContext.getOrCreate(JavaStreamingContext.scala)
> at org.apache.beam.runners.spark.SparkRunner.run(SparkRunner.java:155)
> at org.apache.beam.runners.spark.SparkRunner.run(SparkRunner.java:85)
> at org.apache.beam.sdk.Pipeline.run(Pipeline.java:276)
> at
> org.apache.beam.integration.nexmark.NexmarkRunner.run(NexmarkRunner.java:1232)
> at
> org.apache.beam.integration.nexmark.NexmarkDriver.runAll(NexmarkDriver.java:69)
> at
> org.apache.beam.integration.nexmark.drivers.NexmarkSparkDriver.main(NexmarkSparkDriver.java:46)
> 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:498)
> at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
> {code}
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