[jira] [Closed] (FLINK-6869) Scala serializers do not have the serialVersionUID specified

["Tzu-Li (Gordon) Tai (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-6869?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Tzu-Li (Gordon) Tai closed FLINK-6869.
--------------------------------------

> Scala serializers do not have the serialVersionUID specified
> ------------------------------------------------------------
>
>                 Key: FLINK-6869
>                 URL: https://issues.apache.org/jira/browse/FLINK-6869
>             Project: Flink
>          Issue Type: Bug
>          Components: Scala API, Type Serialization System
>    Affects Versions: 1.3.0
>            Reporter: Tzu-Li (Gordon) Tai
>            Assignee: Tzu-Li (Gordon) Tai
>            Priority: Blocker
>              Labels: flink-rel-1.3.1-blockers
>             Fix For: 1.3.1, 1.4.0
>
>
> Currently, all Scala serializers, e.g. {{OptionSerializer}}, {{CaseClassSerializer}}, {{TrySerializer}} etc. do not have the serialVersionUID specified.
> In 1.3, the Scala serializer (all serializers in general) implementations had to be changed since implementation of the compatibility methods {{snapshotConfiguration}}, {{ensureCompatibility}} had to be implemented, resulting in a new serialVersionUID.
> This means that when restoring from a snapshot pre-1.3 that contains Scala types as state, the previous serializer in the snapshot cannot be deserialized (due to UID mismatch).
> To fix this, we should specify the serialVersionUIDs of the Scala serializers to be what they originally were pre-1.3. This would then allow users with Scala types as state to restore from older versions.



--
This message was sent by Atlassian JIRA
(v6.4.14#64029)