[NIFI-7981] ConvertRecord cannot handle open enum in Avro

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 1.12.1
• Fix Version/s: 1.13.0
• Assignee: Pierre Villard
• Reporter: Christophe Monnet
• Created: 05/Nov/20 10:12
• Updated: 09/Nov/20 16:01
• Resolved: 05/Nov/20 23:21

Description

This avro schema is using the open enum pattern:

{
    "namespace": "acme",
    "name": "openEnum",
    "type": "record",
    "fields": [{
            "name": "personType",
            "type": ["null", {
                    "type": "enum",
                    "name": "personType_enum",
                    "symbols": [
                        "DRIVER",
                        "TECHNICIAN"
                    ]
                }, "string"],
            "default": null
        }
    ]
}

The personType can be either null, an enum, or any string. This brings forward-compatibility.
Using ConvertRecord with

{"personType":"DRIVER"}

as a payload, it works.
But with

{"personType":"DUDE"}

it fails with java.lang.NullPointerException: null of acme.personType_enum of union in field personType of acme.openEnum

Issue Links

• fixes: NIFI-7985 ValidateRecord does not validate the type enum
• links to: GitHub Pull Request #4648