Till Rohrmann created FLINK-6800:
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Summary: PojoSerializer ignores added pojo fields
Key: FLINK-6800
URL: https://issues.apache.org/jira/browse/FLINK-6800
Project: Flink
Issue Type: Bug
Components: Type Serialization System
Affects Versions: 1.3.0, 1.4.0
Reporter: Till Rohrmann
The {{PojoSerializer}} contains a list of pojo fields which are represented as
{{Field}} instances. Upon serialization the names of these fields are
serialized. When being deserialized these names are used to look up the
respective {{Fields}} of a dynamically loaded class. If the dynamically loaded
class has additional fields (compared to when the serializer was serialized),
then these fields will be ignored (for the read and for the write path). While
this is necessary to read stored data, it is dangerous when writing new data,
because all newly added fields won't be serialized. This subtleness is really
hard to detect for the user. Therefore, I think we should eagerly fail if the
newly loaded type contains new fields which haven't been present before.
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