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： ,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。