https://github.com/pingcap/tiflow/blob/v7.1.1/pkg/sink/kafka/options.go#L196C1-L203C1
正常情况下，应该能看到一个Warn级别的日志。
number of partition specified in sink-uri is less than that of the actual topic.
Some partitions will not have messages dispatched to
这些内容有吗？如果没有的话，看看ticdc版本和tidb版本是否一致？