轉自：http://www.cnblogs.com/zq-inlook/p/4386216.html

之前在mac上調試hadoop程序（mac之前配置過hadoop環境）一直都是正常的。因為工作需要，需要在windows上先調試該程序，然后再轉到linux下。程序運行的過程中，報Failed to locate the winutils binary in the hadoop binary path ?java.io.IOException: Could not locate executablenull\bin\winutils.exe in the Hadoop binaries.

　　通過斷點調試、查看源碼發現程序需要根據HADOOP_HOME找到winutils.exe,由于win機器并沒有配置該環境變量，所以程序報 null\bin\winutils.exe。

?

privatestatic String checkHadoopHome() {// first check the Dflag hadoop.home.dir with JVM scopeString home = System.getProperty("hadoop.home.dir");// fall back to the system/user-global env variableif (home == null) {home = System.getenv("HADOOP_HOME");}try {// couldn't find either setting for hadoop's home directoryif (home == null) {thrownew 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 existsFile homedir = new File(home);if (!homedir.isAbsolute() || !homedir.exists() || !homedir.isDirectory()) {thrownew 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();

publicstaticfinal String getQualifiedBinPath(String executable) throws IOException {// construct hadoop bin path to the specified executableString fullExeName = HADOOP_HOME_DIR + File.separator + "bin" + File.separator + executable;File exeFile = new File(fullExeName);if (!exeFile.exists()) {thrownew IOException("Could not locate executable " + fullExeName+ " in the Hadoop binaries.");}return exeFile.getCanonicalPath();}/** a Windows utility to emulate Unix commands */publicstaticfinal String WINUTILS = getWinUtilsPath();publicstaticfinal 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;}

　　找到原因后就去網上問了度娘，找到了解決方案，很簡單，如下：

　　1.下載winutils的windows版本

　　GitHub上，有人提供了winutils的windows的版本，項目地址是：https://github.com/srccodes/hadoop-common-2.2.0-bin,直接下載此項目的zip包，下載后是文件名是hadoop-common-2.2.0-bin-master.zip,隨便解壓到一個目錄

　　2.配置環境變量

　　增加用戶變量HADOOP_HOME，值是下載的zip包解壓的目錄，然后在系統變量path里增加%HADOOP_HOME%\bin 即可?！　?/p>

　　再次運行程序，正常執行。

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