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  1. Beam
  2. BEAM-6086

Flaky tests when using PCollectionView with View.asSingleton()

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    Details

    • Type: Bug
    • Status: Open
    • Priority: Critical
    • Resolution: Unresolved
    • Affects Version/s: None
    • Fix Version/s: None
    • Component/s: runner-direct
    • Labels:
      None

      Description

      Here is the minimal project that demonstrates the issue https://github.com/medvedev1088/dataflow-flaky-tests. About 1 time out of 10 the tests fail with

      org.apache.beam.sdk.Pipeline$PipelineExecutionException: java.lang.IllegalArgumentException: Empty PCollection accessed as a singleton view. Consider setting withDefault to provide a default value

      at org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:332)
      at org.apache.beam.runners.direct.DirectRunner$DirectPipelineResult.waitUntilFinish(DirectRunner.java:302)
      at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:197)
      at org.apache.beam.runners.direct.DirectRunner.run(DirectRunner.java:64)
      at org.apache.beam.sdk.Pipeline.run(Pipeline.java:313)
      at org.apache.beam.sdk.testing.TestPipeline.run(TestPipeline.java:350)
      at org.apache.beam.sdk.testing.TestPipeline.run(TestPipeline.java:331)
      at com.beam.MyPipelineTest.testTokenTransfersBasic(MyPipelineTest.java:29)
      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 org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
      at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
      at org.apache.beam.sdk.testing.TestPipeline$1.evaluate(TestPipeline.java:319)
      at org.junit.rules.RunRules.evaluate(RunRules.java:20)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
      at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
      at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
      at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
      at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
      at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
      Caused by: java.lang.IllegalArgumentException: Empty PCollection accessed as a singleton view. Consider setting withDefault to provide a default value
      at org.apache.beam.sdk.transforms.View$SingletonCombineFn.identity(View.java:378)
      at org.apache.beam.sdk.transforms.Combine$BinaryCombineFn.extractOutput(Combine.java:436)
      at org.apache.beam.sdk.transforms.Combine$BinaryCombineFn.extractOutput(Combine.java:384)
      at org.apache.beam.sdk.transforms.Combine$CombineFn.apply(Combine.java:353)
      at org.apache.beam.sdk.transforms.Combine$GroupedValues$1.processElement(Combine.java:2056)

      Related to https://jira.apache.org/jira/browse/BEAM-6036

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            • Assignee:
              Unassigned
              Reporter:
              medvedev1088 Evgeny
            • Votes:
              1 Vote for this issue
              Watchers:
              2 Start watching this issue

              Dates

              • Created:
                Updated: