故障排查中心

同一错误只保留一个规范页。场景 troubleshooting 只做入口。当前 HTTP 响应字段是 code / message / data / timestamp，errorKey 还在 Spec 里。

按错误编号

errorKey	场景	规范页
`START-PORT-IN-USE`	端口占用	START-PORT-IN-USE
`START-DB-CONNECTION-FAILED`	JDBC 连不上	START-DB-CONNECTION-FAILED
`START-DB-AUTH-FAILED`	数据库认证	START-DB-AUTH-FAILED
`START-DB-NOT-FOUND`	库不存在	START-DB-NOT-FOUND
`START-DB-COLLATION-MIXED`	排序规则混用	START-DB-COLLATION-MIXED
`START-FLYWAY-MIGRATION-FAILED`	Flyway 失败	START-FLYWAY-MIGRATION-FAILED
`START-REDIS-CONNECTION-FAILED`	Redis 连不上	START-REDIS-CONNECTION-FAILED
`START-REDIS-AUTH-FAILED`	Redis 认证	START-REDIS-AUTH-FAILED
`CORE-SYSTEM-UNEXPECTED`	未识别系统错误	CORE-SYSTEM-UNEXPECTED
`LOWCODE-DATASOURCE-DDL-DISABLED`	自动建表开关未开	LOWCODE-DATASOURCE-DDL-DISABLED

关键词	规范页
`Illegal mix of collations` / `utf8mb4_0900_ai_ci`	START-DB-COLLATION-MIXED
`Communications link failure`	START-DB-CONNECTION-FAILED
`Access denied for user`	START-DB-AUTH-FAILED
`Unknown database`	START-DB-NOT-FOUND
`Flyway` / `checksum` / `forge_schema_history`	START-FLYWAY-MIGRATION-FAILED
`Unable to connect to Redis`	START-REDIS-CONNECTION-FAILED
`WRONGPASS` / `NOAUTH`	START-REDIS-AUTH-FAILED
`Port 8580 was already in use` / `BindException`	START-PORT-IN-USE
`当前数据存储未允许自动建表` / `允许运行DDL`	LOWCODE-DATASOURCE-DDL-DISABLED