安装了1.16.2版本的Flink,执行sql-client脚本，后边执行select语句，都会报错:Caused by: java.lang.ClassCastException: cannot assign instance of java.util.LinkedHashMap to field org.apache.flink.runtime.jobgraph.JobVertex.resu....

问答 2024-06-19 来自：开发者社区

polardb mysql版本，flink cdc数据同步

polardb mysql版本，flink cdc数据同步的时候，怎么解决polardb删除或更新了一条数据，同步过来反而新增了一条数据的问题？

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更新时间 2024-08-27 09:09:31

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阿里云实时计算Flink版(Alibaba Cloud Realtime Compute)，完全兼容开源的Apache Flink，比开源性能提升2～3倍，提供了完整的告警、监控、日志的解决方案、提升开发效率且无运维成本，并有社区专家提供技术支持。

立即开通

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产品文档

实时同步

MySQL 到 Hologres

Kafka 到 Hologres

功能对比

开源Flink对比

成本优化

作业自动调优