全量阶段失败报错，关键词“Incorrect prefix key; the used key part isn't a string, the used length is longer than the key part, or the storage engine doesn't support unique prefix keys”

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: retry structures failed events=the fail structures are [type=constraint_data, index=106, schema_name=%s, object_name=%s]reason:[Incorrect prefix key; the used key part isn't a string, the used length is longer than the key part, or the storage engine doesn't support unique prefix keys]

可能原因

源库和目标库表结构不一致。

解决方案

1. 请客户运维工程师修改目标库表结构和源库保持一致。
2. 完成后在任务列表中，单击任务对应操作列的“续传”，重新提交任务。