GAUSS-02154：Failed to create datanode, the maximum number of datanodes %d specified by 'max_datanodes' has been reached. SQLSTATE: 42601
错误码
错误描述：Failed to create datanode, the maximum number of datanodes %d specified by 'max_datanodes' has been reached. SQLSTATE: 42601
错误原因：语法错误，创建的DN数量超过设置的max_datanodes数量。
解决方法：调大max_datanodes配置参数。
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