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https://issues.apache.org/jira/browse/FLINK-6800?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16033249#comment-16033249
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mingleizhang commented on FLINK-6800:
-------------------------------------
What you mean is to add a exception detection mechanism for detecting the newly
loaded type contains new fields which havent been present before ? If the
mechanism detect that situation, then we should throw exception or try catch
it. Right ?
> 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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