Github user zentol commented on a diff in the pull request: https://github.com/apache/flink/pull/3501#discussion_r105406325 --- Diff: flink-streaming-java/src/test/java/org/apache/flink/streaming/api/DataStreamTest.java --- @@ -906,6 +919,256 @@ public void testChannelSelectors() { } ///////////////////////////////////////////////////////////// + // KeyBy testing + ///////////////////////////////////////////////////////////// + + @Rule + public ExpectedException expectedException = ExpectedException.none(); --- End diff -- Well it may be more concise, but a try catch block makes it way more obvious that this part of the code throws an exception we care about. try-catch blocks are also more commonin the codebase, and I'm wondering whether we want to introduce an inconsistency there.
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