It allows me to produce messages with two keys:
Request:
{"records":[{"key":"a2V5", "key":"a2V6","value":"S2Fma2E="}]}
Response:
{
"offsets": [{
"partition": 0,
"offset": 0,
"error_code": null,
"error": null
}],
"value_schema_id": null,
"key_schema_id": null
}
When consume the message I get:
{"array": [{
"partition": 0,
"offset": 0,
"value": "S2Fma2E=",
"key": "a2V6"
}]}