在已經搭建好的集群環境Centos6.6+Hadoop2.7+Hbase0.98+Spark1.3.1下，在Win7系統Intellij開發工具中調試Spark讀取Hbase。運行直接報錯：
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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
)
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查看hadoop源碼發現里有這么一段：
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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"
);
}
...
}
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很明顯應該是HADOOP_HOME的問題。如果HADOOP_HOME為空，必然fullExeName為null\bin\winutils.exe。解決方法很簡單，配置環境變量，不想重啟電腦可以在程序里加上：
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System.setProperty(
"hadoop.home.dir"
,
"E:\\Program Files\\hadoop-2.7.0"
);
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注：E:\\Program Files\\hadoop-2.7.0是我本機解壓的hadoop的路徑。
稍后再執行，你可能還是會出現同樣的錯誤，這個時候你可能會要怪我了。其實一開始我是拒絕的，因為你進入你的hadoop-x.x.x/bin目錄下看，你會發現你壓根就沒有winutils.exe這個東東。
於是我告訴你，你可以去github下載一個，地球人都知道的地址發你一個。
地址：https://github.com/srccodes/hadoop-common-2.2.0-bin
不要顧慮它的版本，不用怕，因為我用的最新的hadoop-2.7.0都沒問題！下載好后，把winutils.exe加入你的hadoop-x.x.x/bin下。
至此問題解決了，如果還沒解決，那你是奇葩哥了，可以加我的QQ！