文档首页/ 数据复制服务 DRS/ 故障排除/ 失败案例/ MySQL->MySQL实时迁移和同步/ 全量阶段失败报错，关键词“Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server”
更新时间：2022-12-27 GMT+08:00
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全量阶段失败报错，关键词“Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server”

场景描述

全量迁移或同步期间DRS任务报错，日志提示信息：service DATAMOVE failed, cause by: Unable to connect to DBMS: url=jdbc:mysql://*** user=root, Caused by: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server。

可能原因

访问源库或目标库时建立连接失败。

解决方案

  1. 检查源库或目标库运行状态是否正常。
  2. 检查DRS实例和源库或目标库之间的网络是否能够连通。
  3. 检查源库或目标库远程访问或者访问白名单是否放通DRS的实例IP。

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