Question: Problems with custom deserializer, UnknownFieldSet

[xstephen95x]

After creating a custom deserializer, and uploading into the app, I get the following when trying to view a View which uses that message format.

 Error Type definition error: [simple type, class com.google.protobuf.UnknownFieldSet$Parser]; nested exception is com.fasterxml.jackson.databind.exc.InvalidDefinitionException: No serializer found for class com.google.protobuf.UnknownFieldSet$Parser and no properties discovered to create BeanSerializer (to avoid exception, disable SerializationFeature.FAIL_ON_EMPTY_BEANS) (through reference chain: org.sourcelab.kafka.webview.ui.manager.kafka.dto.KafkaResults["results"]->java.util.Collections$UnmodifiableRandomAccessList[0]-

Is there anyway to avoid this? #75 looks like it tried to mitigate this, but im still seeing it on master HEAD

[xstephen95x]

Or does the data type returned by the deserializer need to be a string?

[Crim]

So I believe a short term solution would be to return a string. I feel like it should work with the changes in #76

I have a custom deserializer for protobufs that I use, I'll review how I'm using it. I'll post back with what I find.

[Crim]

So I'm updating the linked PR to register a protocol buffer module for jackson, which should allow it to serialize properly without issues.

[Crim]

I've published a new release. I believe this should resolve your issue. Please re-open if you continue to have problems.

Thanks!

[geuno-gil]

In my case, server uses not ProtobufHttpMessageConverter but MappingJackson2HttpMessageConverter
You should add accept header to use application/x-protobuf. Then serialization will be okay