Hadoop 2.1.0测试版javac编译错误

我正在尝试编译中描述的示例，但遇到如下错误：

MultiFetch.java:107: cannot find symbol
symbol  : class Text
location: class edu.brandeis.cs147a.examples.MultiFetch.Reduce
                           OutputCollector<Text, Text> output,

我想我使用了错误的.jar，也尝试了其他的.jar文件，但是我没有找到正确的

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有什么想法吗？

问题解决了。我使用以下命令编译示例：

javac -classpath /opt/hadoop/share/hadoop/common/hadoop-common-2.1.0-beta.jar:/opt/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.1.0-beta.jar:/opt/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.1.0-beta.jar:/opt/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar  -d MultiFetch_classes/ MultiFetch.java

javac -classpath /opt/hadoop/share/hadoop/common/hadoop-common-2.1.0-beta.jar:/opt/hadoop/share/hadoop/mapreduce/hadoop-mapreduce-client-core-2.1.0-beta.jar:/opt/hadoop/share/hadoop/mapreduce/lib/hadoop-annotations-2.1.0-beta.jar:/opt/hadoop/share/hadoop/common/lib/commons-cli-1.2.jar  -d MultiFetch_classes/ MultiFetch.java