Header serialization exception in aggregator processor with Redis #500
Description
When I configure my aggregator with Redis to cache JSON messages, I get a serialization exception because the object does not implement Serializable. This is an known problem with Redis default serializer (JdkSerializationRedisSerializer).
The problem is we don't have a real Java object when the aggregator is used in SCDF (the messages come from Kafka or RabbitMQ)
The recommanded workaround I found is to use GenericJackson2JsonRedisSerializer but there is no way to do this without forking the aggregator (see the answer of @artembilan here : https://stackoverflow.com/questions/77088203/redis-serializer-properties-in-scdf).
It would be great to add a property to set the Redis serializer in the app configuration.
EDIT : According to @artembilan analysis, the problem comes from headers not the payload so the description above is wrong. Some headers must be filtered if not serializable