实时计算 Flink版锁的相关内容

问答 2025-02-13 来自：开发者社区

Flink默认先全量再增量同步，全量时会对checkpoint上锁，导致请求检查点时失败，任务重启

如题，我是新手小白一个。同步的这个表很大，大概需要4小时时间才能导出所有数据。我在启动一个flink任务时，使用的是1.20版本,对应的flink-sql-connector-oracle-cdc-3.3.0.jar。同步命令如下，默认会先全量同步，对checkpoint上锁，导出这个表的全部数据后创建快照，释放checkpoint锁，接着自动进入增量同步模式：bin/flink run \ .....

问答 2024-07-10 来自：开发者社区

flink cdc 2.4.2 不是采用无锁算法吗？不需要数据库锁权限吗？

flink cdc 2.4.2 不是采用无锁算法吗？不需要数据库锁权限吗？还报错需要 reload 权限？Access denied; you need (at least one of) the RELOAD or FLUSH_TABLES privilege(s) for this operation

问答 2024-06-05 来自：开发者社区

在Flink CDC中binlog 有读取锁的机制吗？

文章 2024-05-23 来自：开发者社区

实时计算 Flink版产品使用合集之哪个版本支持使用不锁表功能

问题一：请问对于pg cdc2.4版本，如果使用不锁表功能的话，需要用Flink CDC哪个版本啊？请问对于pg cdc2.4版本，如果使用不锁表功能的话，需要用Flink CDC哪个版本啊？参考答案：官网有版本，基本绝大多数版本都行关于本问题的更多回答可点击进行查看： https://developer....

问答 2024-05-14 来自：开发者社区

Flink k8s HA 锁资源在etcd偶发出现写失败时候，请教一下这个机制有优化的配置吗？

Flink k8s HA 锁资源在etcd偶发出现写失败时候，会导致任务批量HA重启。请教一下这个机制有优化的配置吗？比如锁可以重试几次后再切换嘛？

文章 2024-02-25 来自：开发者社区

Flink超时问题之Flink sql cdc锁超时如何解决

问题一：Flink sql查询NULL值错误 Select id, name, if(type=1,2,null) From user ; 当我执行上面的sql的时候提示我 [ERROR] Could not execute SQL statement. Reason: org.apache.calcite.sql.validate.SqlValidatorException: Ille...

问答 2024-02-01 来自：开发者社区

Flink CDC里自定义udf函数的eval有线程安全问题吗？需要加sync那个锁吗？

文章 2024-02-01 来自：开发者社区

Flink CDC引起的Mysql元数据锁

记一次Flink CDC引起的Mysql元数据锁事故，总结经验教训。后续在编写Flink CDC任务时，要处理好异常，避免产生长时间的元数据锁。同时出现生产问题时要及时排查，不能抱有侥幸心理。 1、事件经过某天上午，收到系统的告警信息，告警提示：同步Mysql的某张表数据到Elasticsearch异常，提示连不上Mysql，当时没有太上心，以为可能是偶尔网络异常。然后立马大...

问答 2023-12-24 来自：开发者社区

Flink CDC中pg cdc哪个版本开始不锁表的？

问答 2023-12-20 来自：开发者社区

Flink CDC2.0以后不是已经实现了全程无锁吗？还需要自己设置吗？

Flink CDC2.0以后不是已经实现了全程无锁吗？还需要自己设置吗？我同步数据的时候dba反馈说锁表了，说其他任何写操作都会timeout

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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。

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实时同步

MySQL 到 Hologres

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功能对比

开源Flink对比

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