Tzu-Li (Gordon) Tai created FLINK-6869:
------------------------------------------
Summary: 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
Fix For: 1.3.1
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
(v6.3.15#6346)
