解决办法：
将本工程导出jar包放到工程根目录下面，并在提交程序前添加下面的设置
conf.set("mapred.jar", "loadforecast_utils.jar"); //其中loadforecast_utils.jar是你的导出的jar文件名。注意第一个参数不要拼写错了。
重新运行问题解决！
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