求助：SQLException及Kafka Connect连接器配置错误排查

Hey there, let's work through your Kafka Connect error together. I see two main issues popping up in your logs, and we'll tackle them one by one to get your Salesforce source connector up and running.

1. Fix the "No suitable driver found for jdbc:sqlserver" Error #

This is the root cause of one of your configuration failures. Kafka Connect can't communicate with your SQL Server because it doesn't have the required JDBC driver in its classpath. Here's how to fix it:

• Download the official Microsoft SQL Server JDBC driver (look for mssql-jdbc-*.jar). Make sure to pick a version compatible with your SQL Server instance and Java runtime.
• Place the downloaded JAR file in a directory that's part of Kafka Connect's classpath:
  • For standalone mode, the easiest spot is your Kafka installation's libs folder (e.g., $KAFKA_HOME/libs).
  • Alternatively, you can specify the JAR path explicitly using the CLASSPATH environment variable when starting Connect:

    CLASSPATH=/path/to/mssql-jdbc-*.jar ./bin/connect-standalone.sh config/connect-standalone.properties /kafka/salesforce-source.properties
    

• Restart your Kafka Connect standalone instance to load the new driver.

2. Resolve the Remaining Connector Configuration Error #

Your logs mention there are 2 configuration errors total. Now that we've fixed the driver issue, let's address the second one by validating your salesforce-source.properties file:

• Double-check your JDBC URL format. It should look like this (note the correct protocol syntax—no spaces!):

  connection.url=jdbc:sqlserver://your-server-name:1433;databaseName=your-db-name
  

• Verify all required configuration fields are filled correctly:
  • connection.user and connection.password for SQL Server authentication
  • Source-specific settings like table.whitelist (tables you want to sync) or mode (sync strategy, e.g., incrementing)
• Cross-reference your config against the official Kafka Connect JDBC Source Connector requirements to ensure you haven't missed any mandatory parameters or used invalid values.

3. Test the Fix #

Once you've updated the driver and corrected your configuration, restart the standalone Connect process with your fixed properties file. If you still see errors, check the full log output to get the exact details of the second configuration issue—this will help you narrow down any remaining problems.

内容的提问来源于stack exchange，提问作者Gokhan