mlflow.exceptions.MlflowException: Param value ‘xxx....‘ had length , which exceeded length limit

mlflow.exceptions.MlflowException: Param value ‘xxx…’ had length 1078, which exceeded length limit of 1000

原因：是因为mlflow版本1.28.0及以后得版本开始有长度的限制

解决方案：退回mlflow1.27.0版本就可以暂时解决这个问题。