我正在尝试将kafka jdbc连接器（源和接收器）与非常旧的数据库（cloudscape）一起使用。我有这个数据库的jdbc驱动程序。我将驱动程序放在confluent（版本5）的“/share/java/kafka/connect/jdbc”文件夹中，并创建了属性文件。

name=test-source-cloud-jdbc-autoincrement
connector.class=io.confluent.connect.jdbc.JdbcSourceConnector
tasks.max=1
connection.url=jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB
mode=incrementing
incrementing.column.name=id
topic.prefix=test-cloud-jdbc-

启动连接器时，日志为：

[2019-01-31 11:23:36,582] DEBUG Finding best dialect for JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:119)
[2019-01-31 11:23:36,582] DEBUG Dialect Db2DatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,582] DEBUG Dialect DerbyDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,582] DEBUG Dialect GenericDatabaseDialect scored 10 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,582] DEBUG Dialect MySqlDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,582] DEBUG Dialect OracleDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,582] DEBUG Dialect PostgreSqlDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,583] DEBUG Dialect SapHanaDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,583] DEBUG Dialect SqlServerDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,583] DEBUG Dialect SqliteDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,583] DEBUG Dialect SybaseDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,583] DEBUG Dialect VerticaDatabaseDialect scored 0 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:126)
[2019-01-31 11:23:36,583] DEBUG Using dialect GenericDatabaseDialect with score 10 against JDBC subprotocol 'cloudscape' and source 'jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB' (io.confluent.connect.jdbc.dialect.DatabaseDialects:132)
[2019-01-31 11:23:36,587] ERROR Failed to create job for ./etc/kafka-connect-jdbc/CloudscapeProperties.properties (org.apache.kafka.connect.cli.ConnectStandalone:102)
[2019-01-31 11:23:36,588] ERROR Stopping after connector error (org.apache.kafka.connect.cli.ConnectStandalone:113)
java.util.concurrent.ExecutionException: org.apache.kafka.connect.runtime.rest.errors.BadRequestException: Connector configuration is invalid and contains the following 2 error(s):
Invalid value java.sql.SQLException: No suitable driver found for jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB for configuration Couldn't open connection to jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB
Invalid value java.sql.SQLException: No suitable driver found for jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB for configuration Couldn't open connection to jdbc:cloudscape:rmi://localhost:1099/CloudscapeDB
You can also find the above list of errors at the endpoint `/{connectorType}/config/validate`
    at org.apache.kafka.connect.util.ConvertingFutureCallback.result(ConvertingFutureCallback.java:79)
    at org.apache.kafka.connect.util.ConvertingFutureCallback.get(ConvertingFutureCallback.java:66)
    at org.apache.kafka.connect.cli.ConnectStandalone.main(ConnectStandalone.java:110)

我想jdbc驱动程序非常旧（它使用java1.3）这一事实有一个问题。驱动程序使用rmi协议进行通信。如果我使用rmijdbc.jar和cloudscape.jar（驱动程序）运行一个非常简单的JavaRMI客户机来查询db，那么我就可以查询db并得到结果。
你认为这是一个与java版本相关的问题吗？而且，有没有可能实现一个自定义的kafka驱动程序来从这个db读取数据？关于这个问题，或者如何为旧数据库实现一个定制的kafka驱动程序，有什么建议吗？