[doc](multi-catalog)add gcs broker load faq (#23229)

add gcs broker load faq

When the '_' is used  at buckt name, will report an error:  Missing required property: uri

the gcs bucket not match the s3 bucket name format: https://docs.aws.amazon.com/zh_cn/AmazonS3/latest/userguide/bucketnamingrules.html

we'd better not use  '_' in bucket.

<!--Describe your changes.-->

docs/en/docs/data-operate/import/import-way/broker-load-manual.md

@@ -434,6 +434,10 @@ Currently the Profile can only be viewed after the job has been successfully exe
 
   Note: If you use the orc file directly generated by some hive versions, the header in the orc file is not hive meta data, but (_col0, _col1, _col2, ...), which may cause Invalid Column Name error, then you need to use set to map
 
+- Import error: `Failed to get S3 FileSystem for bucket is null/empty`
+  1. The bucket is incorrect or does not exist.
+  2. The bucket format is not supported. When creating a bucket name with `_` on GCS, like `s3://gs_bucket/load_tbl`, the S3 Client will report an error. It is recommended not to use `_` on GCS.
+
 ## more help
 
 For more detailed syntax and best practices used by Broker Load, see [Broker Load](../../../sql-manual/sql-reference/Data-Manipulation-Statements/Load/BROKER-LOAD.md) command manual, you can also enter `HELP BROKER LOAD` in the MySql client command line for more help information.

docs/zh-CN/docs/data-operate/import/import-way/broker-load-manual.md

@@ -434,6 +434,10 @@ FE 的配置参数 `async_loading_load_task_pool_size` 用于限制同时运行
 
   注：如果使用某些 hive 版本直接生成的 orc 文件，orc 文件中的表头并非 hive meta 数据，而是（_col0, _col1, _col2, ...）, 可能导致 Invalid Column Name 错误，那么则需要使用 set 进行映射
 
+- 导入报错：`Failed to get S3 FileSystem for bucket is null/empty`
+  1. bucket信息填写不正确或者不存在。
+  2. bucket的格式不受支持。使用GCS创建带`_`的桶名时，比如：`s3://gs_bucket/load_tbl`，S3 Client访问GCS会报错，建议创建bucket路径时不使用`_`。
+
 ## 更多帮助
 
 关于 Broker Load 使用的更多详细语法及最佳实践，请参阅 [Broker Load](../../../sql-manual/sql-reference/Data-Manipulation-Statements/Load/BROKER-LOAD.md) 命令手册，你也可以在 MySql 客户端命令行下输入 `HELP BROKER LOAD` 获取更多帮助信息。