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问答 2023-11-12 来自：开发者社区

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Flink sql-client 针对kafka的protobuf格式数据建表，老是找不到pb类名，报java.lang.ClassNotFoundException 有人遇到过吗？求给点思路，不知道如何解决了?

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flink sql如何过滤掉kafka topic中canal json格式的delete类型数据？

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实时计算Flink版

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

产品控制台

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