联合字段的 Avro 无效默认值

Question

我正在尝试序列化然后写入 hortonworks schema registry 一个 avro 架构，但在写入操作期间我收到以下错误消息。

Caused by: java.lang.RuntimeException: An exception was thrown while processing request with message: [Invalid default for field viewingMode: null not a [{"type":"record","name":"aName","namespace":"domain.assembled","fields":[{"name":"aKey","type":"string"}]},{"type":"record","name":"anotherName","namespace":"domain.assembled","fields":[{"name":"anotherKey","type":"string"},{"name":"yetAnotherKey","type":"string"}]}]]
        at com.hortonworks.registries.schemaregistry.client.SchemaRegistryClient.handleSchemaIdVersionResponse(SchemaRegistryClient.java:678)
        at com.hortonworks.registries.schemaregistry.client.SchemaRegistryClient.doAddSchemaVersion(SchemaRegistryClient.java:664)
        at com.hortonworks.registries.schemaregistry.client.SchemaRegistryClient.lambda$addSchemaVersion(SchemaRegistryClient.java:591)

这是 avro 架构

{
    "type": "record",
    "name": "aSchema",
    "namespace": "domain.assembled",
    "fields": [
        {
            "name": "viewingMode",
            "type": [
                {
                    "name": "aName",
                    "type": "record",
                    "fields": [
                        {"name": "aKey","type": "string"}
                    ]
                },
                {
                    "name": "anotherName",
                    "type": "record",
                    "fields": [
                        {"name": "anotherKey","type": "string"},
                        {"name": "yetAnotherKey","type": "string"}
                    ]
                }
            ]
        }
    ]
}

如果我添加一个 "null" 作为联合的第一种类型，谁就会成功。 avro 联合类型是否需要 "null"？在我的例子中，这将是数据的错误表示，所以我不热衷于这样做。如果有什么不同，我正在使用 avro 1.9.1。

此外，如果标签不正确但找不到 hortonworks-schema-registry 标签并且没有足够的代表来创建新标签，我们深表歉意。

Answer 1

原来是 hortonwork 的模式注册表有问题。这实际上已经被修复 here and I've requested a new release here。希望这会尽快发生。

联合字段的 Avro 无效默认值

Avro invalid default for union field

scala

avro

hortonworks-data-platform

confluent-schema-registry