Github user zentol commented on a diff in the pull request:
https://github.com/apache/flink/pull/3885#discussion_r116488176
--- Diff:
flink-streaming-java/src/main/java/org/apache/flink/streaming/api/graph/StreamGraph.java
---
@@ -318,9 +318,10 @@ public void addVirtualSideOutputNode(Integer
originalId, Integer virtualId, Outp
continue;
}
- if
(!tag.f1.getTypeInfo().equals(outputTag.getTypeInfo())) {
- throw new IllegalArgumentException("Trying to
add a side input for the same id " +
- "with a different type. This is
not allowed.");
+ if (tag.f1.getId().equals(outputTag.getId()) &&
+
!tag.f1.getTypeInfo().equals(outputTag.getTypeInfo())) {
+ throw new IllegalArgumentException("Trying to
add a side output for the same" +
+ "side-output id with a
different type. This is not allowed.");
--- End diff --
Could also include the tag name for good measure.
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