Github user StephanEwen commented on the pull request:
https://github.com/apache/flink/pull/1045#issuecomment-135365948
@zentol This is a delicate change, so let's make sure we understand this
correctly:
The InvalidTypesException is now only used internally in the type
extractor, and never propagated?
I am a bit skeptical about returning the "MissingTypeInfo" in the type
extractor directly. A lot of other places / user code classes create type infos
and most of them will not check for "MissingTypeInfo" - they rather expect to
fail. Only very specific operator places can tolerate the MissingTypeInfo,
because they can swap it with a type hint later.
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