[jira] [Updated] (FLINK-6800) PojoSerializer ignores added pojo fields

["Flink Jira Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6800?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Flink Jira Bot updated FLINK-6800:
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    Labels: auto-unassigned stale-major  (was: auto-unassigned)

I am the [Flink Jira Bot|https://github.com/apache/flink-jira-bot/] and I help the community manage its development. I see this issues has been marked as Major but is unassigned and neither itself nor its Sub-Tasks have been updated for 30 days. I have gone ahead and added a "stale-major" to the issue". If this ticket is a Major, please either assign yourself or give an update. Afterwards, please remove the label or in 7 days the issue will be deprioritized.


> PojoSerializer ignores added pojo fields
> ----------------------------------------
>
>                 Key: FLINK-6800
>                 URL: https://issues.apache.org/jira/browse/FLINK-6800
>             Project: Flink
>          Issue Type: Bug
>          Components: API / Type Serialization System
>    Affects Versions: 1.3.0, 1.4.0
>            Reporter: Till Rohrmann
>            Priority: Major
>              Labels: auto-unassigned, stale-major
>
> 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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