编译hadoop java文件 [英] Compiling hadoop java files
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问题描述
我编译并获取了mapper和reducer的.class文件。
但是当我编译mainjava文件时,我一直收到这个错误。
,它不能指向mapper和reducer类文件。
我该如何解决这个问题?
解决方案
您必须将所有源文件都提供给javac
<例子:
javac -classpath /usr/local/hadoop/hadoop-core-1.0.4.jar -sourcepath src / -d build / MyMain.java MyMapper.java MyReducer.java
I need to compile Java Hadoop programs.
I have compiled and got .class files for mapper and reducer.
But when I compile mainjava file, i keep getting this error.
that is it can't point mapper and reducer class files.
How can I resolve this issue?
解决方案
You have to give all of your source files to javac
Example:
javac -classpath /usr/local/hadoop/hadoop-core-1.0.4.jar -sourcepath src/ -d build/ MyMain.java MyMapper.java MyReducer.java
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