Unable to load schema in adapter notification

[amitoj.s (Amitoj Singh)]

Hi,

I’m using Software AG Designer Version 10.7.I created a webMethods adapter for Apache Kafka. Connection type is Confluent for Kafka Consumer Connection.

I create adapter notification in service development perspective which takes an avro value schema. Recently I was given a schema which had a nested array in another array and both had the same name. This schema failed to load and in server logs I found below error:

Error Details:
Failed to run notificationLookupValues service. Details provided in error log.
schema contains circular dependency.
Caused by: java.lang.IllegalArgumentException: schema contains circular dependency.

Sample Extract of avro schema:

{
   "name": "unitDetails",
   "type": {
      "items": {
         "fields": [
            {
               "name": "num",
               "type": "string"
            },
            {
               "name": "id",
               "type": "string"
            },
            {
               "name": "unitDetails",
               "type": {
                  "items": {
                     "fields": [
                        {
                           "name": "name",
                           "type": "string"
                        },
                        {
                           "name": "role",
                           "type": "string"
                        }
                     ],
                     "name": "unitDetails_record_2",
                     "type": "record"
                  },
                  "type": "array"
               }
            }
         ],
         "name": "unitDetails_record",
         "type": "record"
      },
      "type": "array"
   }
}

Kindly help to use such a schema which may have nested arrays with same name. The actual schema was validated properly and other team was able to send data.

— THANK YOU —

[Dave_Laycock1 (Dave Laycock)]

@amitoj.s

schema

Do you have the latest adapter fix installed? There are some fixes for schema and avro handling, though I don’t see anything mentioned about handling circular dependencies.

[amitoj.s (Amitoj Singh)]

Thanks Dave,

I’m using Adapter version 9.6 and update is WAK_9.6_Fix10. Is there a more recent update available?

[Holger_von_Thomsen]

Hi,

according to the Fix Explorer in Empower, latest Fix is WAK_9.6_Fix11.

Most related entries related to avro schema added in Fix 11 are the following:

WAK-261
In webMethods Adapter for Apache Kafka, listener notification fails to receive
the message when the Avro schema with a field of type array contains a single
item.

This issue is now resolved.

WAK-234
In webMethods Adapter for Apache Kafka, the Produce service fails to execute if
the Avro schema contains a nested array.

This issue is now resolved.

Regards,
Holger