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https://issues.apache.org/jira/browse/FLINK-2124?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14992066#comment-14992066
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Nick Dimiduk commented on FLINK-2124:
-------------------------------------
Debugging, it looks like the source exception is being swallowed someplace. It
looks like the underlying issue is that TypeExtractor cannot resolve the types
of some of the generic arguments. From {{TypeInformation<OUT>
analyzePojo(Class<OUT> clazz, ArrayList<Type> typeHierarchy, ParameterizedType
parameterizedType, TypeInformation<IN1> in1Type, TypeInformation<IN2>
in2Type}}, the {{catch (InvalidTypesException e)}} stanza from 1343 to 1349,
{{e}} is "Type of TypeVariable 'FROM' in 'class Foo' could not be determined.
This is most likely a type erasure problem. The type extraction currently
supports types with generic variables only in cases where all variables in the
return type can be deduced from the input type(s)."
> FromElementsFunction is not really Serializable
> -----------------------------------------------
>
> Key: FLINK-2124
> URL: https://issues.apache.org/jira/browse/FLINK-2124
> Project: Flink
> Issue Type: Bug
> Components: Streaming
> Reporter: Aljoscha Krettek
> Assignee: Johannes Reifferscheid
> Fix For: 0.10
>
>
> The function stores an Iterable of T. T is not necessarily Serializable and
> and Iterable is also not necessarily Serializable.
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