从MySQL到Postgres的Debezium与JDBC Sink - changeforms.route.replacement的更改给出了SinkRecordField错误

Question

我正在使用这个debezium-examples

source.json

{
"name": "inventory-connector",
"config": {
    "connector.class": "io.debezium.connector.mysql.MySqlConnector",
    "tasks.max": "1",
    "database.hostname": "mysql",
    "database.port": "3306",
    "database.user": "debezium",
    "database.password": "dbz",
    "database.server.id": "184054",
    "database.server.name": "dbserver1",
    "database.whitelist": "inventory",
    "database.history.kafka.bootstrap.servers": "kafka:9092",
    "database.history.kafka.topic": "schema-changes.inventory",
    "transforms": "route",
    "transforms.route.type": "org.apache.kafka.connect.transforms.RegexRouter",
    "transforms.route.regex": "([^.]+)\\.([^.]+)\\.([^.]+)",
    "transforms.route.replacement": "$3"
}
}

JDBC-sink.json

{
"name": "jdbc-sink",
"config": {
    "connector.class": "io.confluent.connect.jdbc.JdbcSinkConnector",
    "tasks.max": "1",
    "topics": "customers",
    "connection.url": "jdbc:postgresql://postgres:5432/inventory?user=postgresuser&password=postgrespw",
    "transforms": "unwrap",
    "transforms.unwrap.type": "io.debezium.transforms.UnwrapFromEnvelope",
    "auto.create": "true",
    "insert.mode": "upsert",
    "pk.fields": "id",
    "pk.mode": "record_value"
}
}

它的工作正常。但是当我在下面的场景中进行了一些改变时。它给了我'SinkRecordField'错误。

脚本

我已从源中更改此属性

    "transforms.route.replacement": "my-$2"

现在它在kafka中创建主题如下

my-inventory

当我在jdbc-sink中指定topic = my-inventory时，它给了我以下异常[io.confluent.connect.jdbc.sink.DbStructure]

connect_1    | 2019-01-29 10:34:32,218 INFO   ||  Unable to find fields [SinkRecordField{schema=Schema{STRING}, name='email', isPrimaryKey=false}, SinkRecordField{schema=Schema{STRING}, name='first_name', isPrimaryKey=false}, SinkRecordField{schema=Schema{STRING}, name='last_name', isPrimaryKey=false}] among column names [street, customer_id, city, state, id, type, zip]   [io.confluent.connect.jdbc.sink.DbStructure]
connect_1    | 2019-01-29 10:34:32,220 ERROR  ||  WorkerSinkTask{id=jdbc-sink-0} Task threw an uncaught and unrecoverable exception. Task is being killed and will not recover until manually restarted.   [org.apache.kafka.connect.runtime.WorkerSinkTask]
connect_1    | org.apache.kafka.connect.errors.ConnectException: Cannot ALTER to add missing field SinkRecordField{schema=Schema{STRING}, name='email', isPrimaryKey=false}, as it is not optional and does not have a default value
connect_1    |  at io.confluent.connect.jdbc.sink.DbStructure.amendIfNecessary(DbStructure.java:133)

注意：在Db中，它创建名为“my-inventory”的表

Answer 1

JDBC接收器每个主题需要一个表，每个主题也有一个单独的模式（列名称为x类型）。

您在Debezium / source端的正则表达式路由实际上是将inventory数据库中的任何表（可能包括一些系统的表，虽然我不记得是配置中的默认值）转储到“my-inventory”主题。

因此，只要您在该主题中捕获了多个表格，您就可能遇到麻烦......