目前采用flink on yarn， flink版本是1.7.2，hadoop是2.8.5 现在遇到个问题，假设订单对象Order，因使用了窗口等，所以有状态产生，假设现在要在Order中添加几个新的字段，采用savepoint重启任务，就会报错，看错误信息是反序列化问题（rocksdb默认用的kryo），只能kill掉再重启，导致状态丢失，请问有什么解决办法吗？需求不断变更，肯定会定期增加.....

问答 2021-11-17 来自：开发者社区

Flink的状态后端RocksDB的优点是什么？

问答 2020-01-03 来自：开发者社区

请教一下，flink任务不开启checkpoint的话，状态后端采用rocksdb的话，这种情况的出

请教一下，flink任务不开启checkpoint的话，状态后端采用rocksdb的话，这种情况的出来逻辑大概是什么样的呀？每条状态都读写rocksdb吗？本问题来自阿里云开发者社区的【11大垂直技术领域开发者社群】。点击这里欢迎加入感兴趣的技术领域群。

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更新时间 2025-05-07 16:01:43

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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