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Stephan Ewen resolved FLINK-952. -------------------------------- Resolution: Fixed Fix Version/s: 0.9 Fixed with the introduction of the subclass aware pojo and generic type serializers. > TypeExtractor requires the argument types of the UDF to be identical to the > parameter types > ------------------------------------------------------------------------------------------- > > Key: FLINK-952 > URL: https://issues.apache.org/jira/browse/FLINK-952 > Project: Flink > Issue Type: Bug > Components: Local Runtime > Reporter: Till Rohrmann > Fix For: 0.9 > > > The TypeExtractor checks for each operation whether the DataSet element types > are valid arguments for the UDF. However, it checks for strict equality > instead of a subtype relationship. Thus the following computation would not > work even though it should semantically be correct. > DataSet[B].map(new MapFunction[A,A](){ A map(A x)}) with B being a sub class > of A. -- This message was sent by Atlassian JIRA (v6.3.4#6332)