WIN7下运行hadoop程序报：Failed to locate the winutils binary in the hadoop binary path

之前在mac上调试hadoop程序（mac之前配置过hadoop环境）一直都是正常的。因为工作需要，需要在windows上先调试该程序，然后再转到linux下。程序运行的过程中，报 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.

通过断点调试、查看源码发现程序需要根据HADOOP_HOME找到winutils.exe,由于win机器并没有配置该环境变量，所以程序报 null\bin\winutils.exe。

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");  }  try {     // couldn't find either setting for hadoop's home directory     if (home == null) {       throw new IOException("HADOOP_HOME or hadoop.home.dir are not set.");     }     if (home.startsWith("\"") && home.endsWith("\"")) {       home = home.substring(1, home.length()-1);     }     // check that the home setting is actually a directory that exists     File homedir = new File(home);     if (!homedir.isAbsolute() || !homedir.exists() || !homedir.isDirectory()) {       throw new IOException("Hadoop home directory " + homedir         + " does not exist, is not a directory, or is not an absolute path.");     }     home = homedir.getCanonicalPath();  } catch (IOException ioe) {    if (LOG.isDebugEnabled()) {      LOG.debug("Failed to detect a valid hadoop home directory", ioe);    }    home = null;  }      return home;}

private static String HADOOP_HOME_DIR = checkHadoopHome ();

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();}/** a Windows utility to emulate Unix commands */public static final String WINUTILS = getWinUtilsPath();public static final String getWinUtilsPath() {  String winUtilsPath = null;  try {    if (WINDOWS) {      winUtilsPath = getQualifiedBinPath("winutils.exe");    }  } catch (IOException ioe) {     LOG.error("Failed to locate the winutils binary in the hadoop binary path",       ioe);  }  return winUtilsPath;}

找到原因后就去网上问了度娘，找到了解决方案，很简单，如下：

1.下载winutils的windows版本

GitHub上，有人提供了winutils的windows的版本，项目地址是：https://github.com/srccodes/hadoop-common-2.2.0-bin ,直接下载此项目的zip包，下载后是文件名是hadoop-common-2.2.0-bin-master.zip,随便解压到一个目录

2.配置环境变量

增加用户变量HADOOP_HOME，值是下载的zip包解压的目录，然后在系统变量path里增加$HADOOP_HOME\bin 即可。

再次运行程序，正常执行。