Hadoop报错：Failed to locate the winutils binary in the hadoop binary path

1 发现问题

在虚拟机中搭建了hadoop集群，在windows中通过代码访问报错


15/06/11 15:35:50 ERROR Shell: Failed to locate the winutils binary in the hadoop binary path
java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries.
    at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:356)
    at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:371)
    at org.apache.hadoop.util.Shell.<clinit>(Shell.java:364)

2 分析问题
打开源码，查看getQualifiedBinPath方法


public static final String getQualifiedBinPath(String executable) 
  throws IOException {
    // construct hadoop bin path to the specified executable
    String fullExeName = HADOOP_HOME_DIR + File.separator + "bin"
      + File.separator + executable;
 
    File exeFile = new File(fullExeName);
    if (!exeFile.exists()) {
      throw new IOException("Could not locate executable " + fullExeName
        + " in the Hadoop binaries.");
    }
 
    return exeFile.getCanonicalPath();
  }
 
private static String HADOOP_HOME_DIR = checkHadoopHome();
private static String checkHadoopHome() {
 
    // first check the Dflag hadoop.home.dir with JVM scope
    String home = System.getProperty("hadoop.home.dir");
 
    // fall back to the system/user-global env variable
    if (home == null) {
      home = System.getenv("HADOOP_HOME");
    }
     ...
}

exeFile不存在会报错，也就是fullExeName不存在。即windows中没有配置HADOOP_HOME。

3 解决问题
配置环境变量E:\\Program Files\\hadoop-2.7.0重启电脑。或者代码中设置System.setProperty("hadoop.home.dir", "E:\\Program Files\\hadoop-2.7.0"); 还有一种可能HADOOP_HOME的bin目录下根本没有winutils.exe，下载地址https://github.com/srccodes/hadoop-common-2.2.0-bin

原贴地址：http://www.cnblogs.com/hyl8218/p/5492450.html