NIFI: Unable to post AVRO message to kafka topic using Confluence Schema Registry service

[#1]

Hi community,

Our NIFI version: 1.23.0.
We are converting JSON message to AVRO format and posting to KAFKA topic using  

PublishKafkaRecord_2_0 1.23.0:

JSON Tree Reader:

AVRO Record Set Writer:

Confluent Schema Registry:

We are not able to post  the message with the error below.
We are able to see the AVRO schema in the KAFKA registry through POSTMAN and using browser URL and we are able to connect to that KAFKA topic with the same parameters in NIFI .

Could you please help us to resolve this issue.

Error:

[#2 · Accepted solution]

@MariaE 

It sounds like from the shared exception the data coming from your source json did not match the schema returned from "zv60-u-ab-...".  Looks like the data had a null value in the channel field but the schema does not support null values.   

So either an  issue with the source data or the schema needs to be modified to support null values. 

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Thank you,
Matt

[#3]

Hi Matt, 
yes it was the case of null values - we updated avro schema and set default values for enums and were able to connect and post messages to kafka.
Thanks