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：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
|
15/06/11 15:35:50 ERROR Shell: Failed to locate the winutils binary in the hadoop binary pathjava.io.IOException: Could not locate executable nullinwinutils.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：
|
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
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nullinwinutils.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：
|
1
|
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。