Could not add AVRO schema using producer client

Describe the bug Unable to add AVRO schema on a topic using producer client.

To Reproduce Steps to reproduce the behavior:

1. create a topic
2. produce a message with json schema

Producer<User> producer = client.newProducer(Schema.JSON(User.class)).topic(Commons.TOPIC).create();
      User user = new User("rahul",31);
      MessageId msgId = producer.send(user);

1. get schema api - return json schema type

{
    "getSchemaResponses": [
        {
            "version": 0,
            "type": "JSON",
            "timestamp": 0,
            "data": "{\"type\":\"record\",\"name\":\"User\",\"namespace\":\"com.optum.link.pulsar\",\"fields\":[{\"name\":\"name\",\"type\":[\"null\",\"string\"],\"default\":null},{\"name\":\"age\",\"type\":\"int\"}]}",
            "properties": {
                "__jsr310ConversionEnabled": "false",
                "__alwaysAllowNull": "true"
            }
        }
    ]
}

1. produce 2nd message with avro schema

Producer<User> producer = client.newProducer(Schema.AVRO(User.class)).topic(Commons.TOPIC).create();
      User user = new User("josh",31);
      MessageId msgId = producer.send(user);

1. get schema api - returns only previously created json schema object. it did not include AVRO schema

{
    "getSchemaResponses": [
        {
            "version": 0,
            "type": "JSON",
            "timestamp": 0,
            "data": "{\"type\":\"record\",\"name\":\"User\",\"namespace\":\"com.optum.link.pulsar\",\"fields\":[{\"name\":\"name\",\"type\":[\"null\",\"string\"],\"default\":null},{\"name\":\"age\",\"type\":\"int\"}]}",
            "properties": {
                "__jsr310ConversionEnabled": "false",
                "__alwaysAllowNull": "true"
            }
        }
    ]
}

Expected behavior Avro schema should be added pulsar schema registry, or if this is not feasible then producer client should throw error

Screenshots NA

Desktop (please complete the following information):

• OS: iOS
• Pulsar: 2.7.0
• Pulsar Client: 2.7.0

Additional context I could successfully produce/consume messages using json schema.

[limingnihao]

I will fix this issue, please assign it to me. A check for Scheme Type will be added.

[codelipenghui]

@ta1meng We are working on the PR to fix this problem. The difference between the AVRO schema and JSON schema is the serialization, JSON schema encode to the JSON bytes and the AVRO schema encode to the AVRO format bytes.