在使用Flink CDC读取MySQL数据时，如果没有手动指定server-id，会报告有相同的server-id错误。一般来说，手动指定server-id可以规避这种情况。但是，手动指定server-id时如何确保与MySQL主从同步使用的不重复？又如何知道哪些server-id尚未使用？另外，为什么Flink CDC默认分配的server-id会重复？

问答 2023-12-19 来自：开发者社区

Flink CDC Mysql cdc job 运行时间久了，就发现不同步数据了，有没有遇到过吗？

"Flink CDC Mysql cdc job 运行时间久了，就发现不同步数据了，只有重启才能继续同步数据。有没有同学遇到过这个问题：https://github.com/ververica/flink-cdc-connectors/issues/25682.4.2 说是这个问题解决了，但我切到 2.3 及以后的版本会出现下面的问题，是怎么回事呢？https://github.com/verv....

问答 2023-12-19 来自：开发者社区

Flink CDC升级mysql cdc为2.4.0版本，对于无主键表，但是增量数据进不来？

Flink CDC升级mysql cdc为2.4.0版本，对于无主键表，通过配置【scan.incremental.snapshot.chunk.key-column】可以全量同步了，但是增量数据进不来？

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