[jira] [Created] (FLINK-6550) Calling ctx.collect with a null OutputTag should log a warning or throw an exception

[Shang Yuanchun (Jira)]

Chesnay Schepler created FLINK-6550:
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             Summary: Calling ctx.collect with a null OutputTag should log a warning or throw an exception
                 Key: FLINK-6550
                 URL: https://issues.apache.org/jira/browse/FLINK-6550
             Project: Flink
          Issue Type: Improvement
          Components: Streaming
            Reporter: Chesnay Schepler
            Priority: Minor


When using side outputs it is currently possible to call {Context#collect(OutputTag<X>, X record)} with null for the OutputTag. Effectively this causes the data to be swallowed. It is unlikely that a user actually intends this, so i propose to either log a warning or throw an exception.



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