运行Pig时出现这个错误：
[main] ERROR org.apache.pig.Main - ERROR 2998: Unhandled internal error. Found interface jline.Terminal, but class was expected
解决的办法是把${HADOOP_HOME}/share/hadoop/yarn/lib下的jline-2.1.1.jar删除掉，再重启Hadoop就可以了。
Pig错误:ERROR 2998: Unhandled internal error. Found interface jline.Terminal, but class was expected
原文：http://www.cnblogs.com/mstk/p/6617675.html