在搭建好Hadoop Eclipse开发环境后,编写map-reduce,遇到如下的问题:

从字面上可以看出,工程缺少org.apache.commons.cli.Options,这个包被间接的被其他包使用,根据经验推断,这个应该是缺少$HADOOP_HOMT/lib下的某一个包,通过不断的尝试,发现是缺少了commons-cli-1.2.jar包,

通过Java Build Path设置后,恢复正常。

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