We are facing a problem similar to one reported in an old question here on Pega Support Center:

Old Question  

Pega version: 8.6.2

We are also trying to write to an external topic that the avro contains fields that are defined as "null" and "string".

In all tests, Pega is able to write to the topic, but generates warnings for each field with this message:

com.pega.dsm.kafka.api.serde.avro.AvroSerdeException: Unsupported data type! Null at....

We would like to know if threre is any guidance on how to resolve these warnings. Also like to understand why they happen.

We have already tried to create a log category with Error level for this class, and it also had no effect. The warning logs continue to apeear.