Hadoop编程踩坑
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Hadoop踩坑
在hadoop所有组件编程中，遇到在Windows下运行程序出现
1 java.io.IOException: Could not locate executable null\\bin\\winutils.exe in the Hadoop binaries. 2 at org.apache.hadoop.util.Shell.getQualifiedBinPath(Shell.java:356) 3 at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:371) 4 at org.apache.hadoop.util.Shell.<clinit>(Shell.java:364) 5 at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:80) 6 at org.apache.hadoop.security.SecurityUtil.getAuthenticationMethod(SecurityUtil.java:611) 7 at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:272) 8 at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:260) 9 at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:790) 10 at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:760) 11 at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:633) 12 at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2214) 13 at org.apache.spark.util.Utils$$anonfun$getCurrentUserName$1.apply(Utils.scala:2214) 14 at scala.Option.getOrElse(Option.scala:121) 15 at org.apache.spark.util.Utils$.getCurrentUserName(Utils.scala:2214) 16 at org.apache.spark.SparkContext.<init>(SparkContext.scala:322) 17 at leftOutJoin.sparkTopN$.main(SparkLefOutJoin.scala:19) 18 at leftOutJoin.sparkTopN.main(SparkLefOutJoin.scala)
通常是需要放置一个系统缺失的应用“
null\\bin\\winutils.exe
”
建议在代码中插入一行
1 System.setProperty("hadoop.home.dir", "F:\\\\spack\\\\hadoop-common-2.2.0-bin-master")
这里我写的路径是我自己的当然，如果你没有
winutils.exe
那你可以下载我上传的：链接
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