Nico Kruber created FLINK-19972:
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Summary: Provide more details when type serializers are not
compatible
Key: FLINK-19972
URL: https://issues.apache.org/jira/browse/FLINK-19972
Project: Flink
Issue Type: Improvement
Components: Runtime / State Backends
Affects Versions: 1.11.2
Reporter: Nico Kruber
Assignee: Nico Kruber
Fix For: 1.12.0
Currently, when the type serializer is incompatible, you get exceptions like
these:
{code:java}
StateMigrationException("For heap backends, the new namespace serializer must
be compatible.");
StateMigrationException("The new namespace serializer must be compatible.");
StateMigrationException("For heap backends, the new state serializer must not
be incompatible.");
StateMigrationException("The new state serializer cannot be incompatible.")
StateMigrationException("The new key serializer must be compatible."){code}
which are not really helpful to the user in debugging serializers.
Since we already have the old serializer (snapshot) and the new one available,
we should add this detail to the exceptions for improved usability.
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