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获取Kudu元数据信息，目前直接查询Kudu表即可
原因如下：（官网文档）
Catalog Table
The catalog table is the central location for metadata of Kudu. It stores information about tables and tablets. The catalog table may not be read or written directly. Instead, it is accessible only via metadata operations exposed in the client API.
The catalog table stores two categories of metadata:
因此不能直接读取，因此需要直接读取kudu数据做解析即可。