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可能原因 目标库创建索引时，需要的内存大于数据库配置maintenance_work_mem的大小。 解决方案 参考修改实例参数内容，修改目标数据库RDS for PostgreSQL配置参数maintenance_work_mem至合适值。
全量或增量阶段失败报错，关键词“database log download failed” 场景描述 全量或增量阶段，DRS迁移或同步任务报错，日志提示信息：service LOGMANAGER failed, cause by: database log download failed
]:Failed to connect to database due to network, check the network between the DRS and the database or try again later.
cause by: retry structures failed events=the fail structures are [type=constraint_data, index=106, schema_name=%s, object_name=%s]reason:[Incorrect
全量阶段失败报错，关键词“Too many keys specified; max 64 keys allowed” 场景描述 全量迁移或同步期间，日志界面提示信息：service DATAMOVE failed, cause by: retry structures failed
全量或增量阶段失败报错，关键词“Communications link failure” 场景描述 全量或增量阶段，DRS迁移或同步任务报错，日志提示信息：service %s failed, cause by: Communications link failure The last
unavailable.
cause by: retry structures failed events=the fail structures are [type=constraint_data, index=0, schema_name=%s, object_name=%s]reason:[The
by: [reason]:Failed to connect to database due to network, check the network between the DRS and the database or try again later.
or try again later.
全量或增量阶段失败报错，关键词“Extract db create sql failed” 场景描述 全量或增量阶段，DRS迁移或同步任务报错，日志提示信息：service LOGMANAGER failed, cause by: Extract db create sql failed
场景描述 全量或增量阶段，DRS迁移或同步任务报错，日志提示信息：service CAPTURER failed, cause by: tbinlog parse fail, data dictionary may be not complete!
灾备阶段失败报错，关键词“A dml without pk write target db fail” 场景描述 MySQL为源灾备任务报错，日志界面提示：A dml without pk write target db fail。
全量阶段失败报错，关键词“Unknown database ***” 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
全量同步失败报错，关键词“invalid locale name” 场景描述 全量同步期间DRS任务报错，同步日志界面提示：service DATAMOVE failed, cause by: target engine postgresql client initialize failed
全量阶段失败报错，关键词“transfer account failed, can not find password from src DB” 场景描述 全量迁移期间DRS任务报错，日志提示信息：service DATAMOVE failed, cause by: transfer
`%s ` failed: Lock wait timeout exceeded; try restarting transaction。 可能原因 目标库有客户业务连接长时间持有锁。 目标库性能不足或负载较大执行较慢。
unavailable.
全量同步失败报错，关键词“column *** does not exist” 场景描述 全量同步期间DRS任务报错，同步日志界面提示：service DATAMOVE failed, cause by: retry structures failed events=the fail
全量同步失败报错，关键词“type 'geometry' does not exist” 场景描述 全量同步期间DRS任务报错，同步日志界面提示：service DATAMOVE failed, cause by: retry structures failed events=the
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