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https://issues.apache.org/jira/browse/FLINK-14757?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17328206#comment-17328206
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Flink Jira Bot commented on FLINK-14757:
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This major issue is unassigned and itself and all of its Sub-Tasks have not
been updated for 30 days. So, it has been labeled "stale-major". If this ticket
is indeed "major", please either assign yourself or give an update. Afterwards,
please remove the label. In 7 days the issue will be deprioritized.
> 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: 1.9.0, 1.9.1
> Reporter: Tim Bess
> Priority: Major
> Labels: stale-major
>
> [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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