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  1. Apache Nemo
  2. NEMO-160

Handle Beam VoidCoder properly

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      In DataFetchers, we're assuming Beam VoidCoders in the following cases.

      • SourceDataFetcher: When the given element is null
      • ParentTaskDataFetcher: When there is no given element

      This not only fails under boundary conditions (a source emits a null, parent task has not produced anything), but also complicates the code.

      We'll probably have to fix both the compiler and the runtime to address this issue.

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              • Assignee:
                johnyangk John Yang
                Reporter:
                johnyangk John Yang
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