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 executable\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。
hadoop運行wordcount卡住了？?
private static 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) {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 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();public static final 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()) {throw new IOException("Could not locate executable " + fullExeName+ " in the Hadoop binaries.");}return exeFile.getCanonicalPath();}/** a Windows utility to emulate Unix commands */publicstaticfinal 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
locate、 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。
hadoop啟動不了start、 再次運行程序，正常執行。
