JIRA: https://jira.spring.io/browse/INT-3939 Previously `RedisQueueInboundGateway` and `RedisQueueOutboundGateway` used different `RedisSerializer`s for non-String objects. * Change the default to the `JdkSerializationRedisSerializer` for the consistency in case of client/server scenarios. The previous behavior with the `StringRedisSerializer` can be reinstated with `serializer` injection. Doc Polishing.