Github user srdo commented on the issue:
https://github.com/apache/storm/pull/1999
@hmcl Either one is fine by me. Keeping it consistent with the old spout is
probably the best solution. The only case where defaulting to emitting nulls
makes sense is if the user supplies a RecordTranslator that sometimes returns
null erroneously, because they'll then see the bug when they get unexpected
nulls, but I don't think it's a big problem.
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