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Kafka Adapter is unable to serialize a record when it contains both another record and an array of records

  • 1.  Kafka Adapter is unable to serialize a record when it contains both another record and an array of records

    Posted Wed October 19, 2022 06:01 AM

    This is actually a reply to this other message Getting error in Kafka Adapter , to which I can’t reply because it is closed.

    The same Exception reported there (ClassCastException: java.util.ArrayList cannot be cast to org.apache.avro.generic.IndexedRecord) happened to me, and at least in my case it happened when publishing to Confluent Kafka a message using an Avro schema that defined a record (structure) that in turn contained, as direct children, both another record and an array of records. I.e. an schema such as:

    • record1
      • array of record2
      • record3

    This can be worked around if you change the Avro schema so that the array of record2 is not a direct child of record1, but it is wrapped inside another record; i.e.:

    • record1
      • record4
        • array of record2
      • record3

    This must be a bug in Kafka Adapter. If I have time, I will file an SI in Empower.


    #webMethods
    #Adapters-and-E-Standards
    #Integration-Server-and-ESB


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