java.io.IOException: Could not locate executable null\bin\winutils.exe in the Hadoop binaries

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在已经搭建好的集群环境Centos6.6+Hadoop2.7+Hbase0.98+Spark1.3.1下，在Win7系统Intellij开发工具中调试Spark读取Hbase。运行直接报错：

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)
at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:80)
at org.apache.hadoop.security.SecurityUtil.getAuthenticationMethod(SecurityUtil.java:611)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:272)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:260)
at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:790)
at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:760)
at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:633)
at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2001)
at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2001)
at scala.Option.getOrElse(Option.scala:120)
at org.apache.spark.util.Utils$.getCurrentUserName(Utils.scala:2001)
at org.apache.spark.SecurityManager.<init>(SecurityManager.scala:207)
at org.apache.spark.SparkEnv$.create(SparkEnv.scala:218)
at org.apache.spark.SparkEnv$.createDriverEnv(SparkEnv.scala:163)
at org.apache.spark.SparkContext.createSparkEnv(SparkContext.scala:269)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:272)
at org.apache.spark.SparkContext.<init>(SparkContext.scala:154)
at SparkFromHbase$.main(SparkFromHbase.scala:15)
at SparkFromHbase.main(SparkFromHbase.scala)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:134)

查看hadoop源码发现里有这么一段：

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");
}
...
}

很明显应该是HADOOP_HOME的问题。如果HADOOP_HOME为空，必然fullExeName为null\bin\winutils.exe。解决方法很简单，配置环境变量，不想重启电脑可以在程序里加上：

System.setProperty("hadoop.home.dir", "E:\\Program Files\\hadoop-2.7.0");

注：E:\Program Files\hadoop-2.7.0是我本机解压的hadoop的路径。

稍后再执行，你可能还是会出现同样的错误，这个时候你可能会要怪我了。其实一开始我是拒绝的，因为你进入你的hadoop-x.x.x/bin目录下看，你会发现你压根就没有winutils.exe这个东东。

于是我告诉你，你可以去github下载一个，地球人都知道的地址发你一个。

地址：https://github.com/srccodes/hadoop-common-2.2.0-bin

不要顾虑它的版本，不用怕，因为我用的最新的hadoop-2.7.0都没问题！下载好后，把winutils.exe加入你的hadoop-x.x.x/bin下。