为什么记录不能使用Kafka Connect中的JDBC Sink连接器删除

Question

我的接收器属性：

{
  "name": "jdbc-oracle",
  "config": {
    "connector.class": "io.confluent.connect.jdbc.JdbcSinkConnector",
    "tasks.max": "1",
    "topics": "orders",
    "connection.url": "jdbc:oracle:thin:@10.1.2.3:1071/orac",
    "connection.user": "ersin",
    "connection.password": "ersin!",
    "auto.create": "true",
    "delete.enabled": "true",
    "pk.mode": "record_key",
    "pk.fields": "id",
    "insert.mode": "upsert",
    "plugin.path": "/home/ersin/confluent-5.4.1/share/java/",
    "name": "jdbc-oracle"
  },
  "tasks": [
    {
      "connector": "jdbc-oracle",
      "task": 0
    }
  ],
  "type": "sink"
}

我的connect-avro-distributed.properties：

bootstrap.servers=10.0.0.0:9092

group.id=connect-cluster

key.converter=io.confluent.connect.avro.AvroConverter
key.converter.schema.registry.url=http://10.0.0.0:8081
value.converter=io.confluent.connect.avro.AvroConverter
value.converter.schema.registry.url=http://10.0.0.0:8081

config.storage.topic=connect-configs
offset.storage.topic=connect-offsets
status.storage.topic=connect-statuses

config.storage.replication.factor=1
offset.storage.replication.factor=1
status.storage.replication.factor=1

internal.key.converter=org.apache.kafka.connect.json.JsonConverter
internal.value.converter=org.apache.kafka.connect.json.JsonConverter
internal.key.converter.schemas.enable=false
internal.value.converter.schemas.enable=false

我发送这样的数据：

./bin/kafka-avro-console-producer \
  --broker-list 10.0.0.0:9092 --topic orders \
  --property parse.key="true" \
  --property key.schema='{"type":"record","name":"key_schema","fields":[{"name":"id","type":"int"}]}' \
  --property key.separator="$" \
  --property value.schema='{"type":"record","name":"myrecord","fields":[{"name":"id","type":["null","int"],"default": null},{"name":"product","type": ["null","string"],"default": null}, {"name":"quantity", "type":  ["null","int"],"default": null}, {"name":"price","type":  ["null","int"],"default": null}]}' \
  --property schema.registry.url=http://10.0.0.0:8081

我可以这样在oracle上插入或更新数据

{"id":3}${"id": {"int":2}, "product": {"string":"Yağız Gülbahar"}, "quantity": {"int":1071}, "price": {"int":1453}}

但是当我把它删除在oracle上的记录时，它不能删除数据，只是将列更新为null

{"id":2}${"id": null, "product": null , "quantity": null , "price": null }

我该如何解决？

预先感谢

Answer 1

[要删除记录，Kafka期望值是null

---

因此，而不是

{"id":2}${"id": null, "product": null , "quantity": null , "price": null }

您需要提供一个空值。以下应该可以解决问题：

{"id":2}$