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https://issues.apache.org/jira/browse/FLINK-6799?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17324861#comment-17324861
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Till Rohrmann commented on FLINK-6799:
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[~tzulitai] shall we close this ticket as won't do?
> PojoSerializer does not check field types when being deserialized
> -----------------------------------------------------------------
>
> Key: FLINK-6799
> URL: https://issues.apache.org/jira/browse/FLINK-6799
> Project: Flink
> Issue Type: Bug
> Components: API / Type Serialization System
> Affects Versions: 1.1.5, 1.2.1, 1.3.0, 1.4.0
> Reporter: Till Rohrmann
> Assignee: Tzu-Li (Gordon) Tai
> Priority: Major
> Labels: stale-assigned
>
> The {{PojoSerializer}} stores internally the fields of a pojo as {{Field}}
> instances. These field instances are serialized via the {{FieldSerializer}}.
> The {{FieldSerializer}} simply writes out the name of the field. When being
> deserialized, the serializer reads the name and then looks up the field using
> the dynamically loaded class. If the underlying class changes, e.g. type of
> fields change, then this won't be noticed, because we don't check the field
> types. In order to catch errors early and to give meaningful error messages,
> I think we should add type checks for the reloaded fields.
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