[jira] [Created] (FLINK-14757) scala.StreamExecutionEnvironment Doesn't set return type upon adding source

[Shang Yuanchun (Jira)]

Tim Bess created FLINK-14757:
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             Summary: scala.StreamExecutionEnvironment Doesn't set return type upon adding source
                 Key: FLINK-14757
                 URL: https://issues.apache.org/jira/browse/FLINK-14757
             Project: Flink
          Issue Type: Bug
          Components: API / Scala
    Affects Versions: 1.9.1, 1.9.0
            Reporter: Tim Bess


[This line|https://github.com/apache/flink/blob/d36ce5ff77fae2b01b8fbe8e5c15d610de8ed9f5/flink-streaming-scala/src/main/scala/org/apache/flink/streaming/api/scala/StreamExecutionEnvironment.scala#L618] in StreamExecutionEnvironment.scala was changed to remove the `returns` call starting in version 1.9.0. This causes subsequent transformations on the stream to fail since the return TypeInformation isn't set anymore.

 

Looks like the change was made in [this pr|https://github.com/apache/flink/pull/8914]. Guessing it was a mistake unless there's some reason to do this that I'm not understanding.

 

I'm willing to make the PR to fix it, just need it changed so we can start upgrading our microservices to 1.9.



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