在windows下buildhadoop源码时:
Failed to execute goal org.apache.maven.plugins:maven-antrun-plugin:1.7:run (tar) on project hadoop-yarn-project: An Ant BuildException has occured: Execute failed: java.io.IOException: Cannot run program "sh" (in directory "D:\DATA\program_data\hadoop\hadoop-2.7.0-src\hadoop-yarn-project\target"): CreateProcess error=2, 系统找不到指定的文件