log4j打出来以下错误，如何解决

Question

java.io.IOException: HADOOP_HOME or hadoop.home.dir are not set.
at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:354)
at org.apache.hadoop.util.Shell.(Shell.java:379)
at org.apache.hadoop.util.StringUtils.(StringUtils.java:79)
at org.apache.hadoop.security.Groups.parseStaticMapping(Groups.java:168)
at org.apache.hadoop.security.Groups.(Groups.java:132)
at org.apache.hadoop.security.Groups.(Groups.java:100)
at org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:435)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:341)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:308)
at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:895)
at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:861)
at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:728)
at org.apache.hadoop.mapreduce.task.JobContextImpl.(JobContextImpl.java:72)
at org.apache.hadoop.mapreduce.Job.(Job.java:145)
at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:188)
at com.michael.Bigdata_01.mapreduce.wc.WordCountApp.main(WordCountApp.java:38)
96 [main] ERROR org.apache.hadoop.util.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:407)
at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:422)
at org.apache.hadoop.util.Shell.(Shell.java:415)
at org.apache.hadoop.util.StringUtils.(StringUtils.java:79)
at org.apache.hadoop.security.Groups.parseStaticMapping(Groups.java:168)
at org.apache.hadoop.security.Groups.(Groups.java:132)
at org.apache.hadoop.security.Groups.(Groups.java:100)
at org.apache.hadoop.security.Groups.getUserToGroupsMappingService(Groups.java:435)
at org.apache.hadoop.security.UserGroupInformation.initialize(UserGroupInformation.java:341)
at org.apache.hadoop.security.UserGroupInformation.ensureInitialized(UserGroupInformation.java:308)
at org.apache.hadoop.security.UserGroupInformation.loginUserFromSubject(UserGroupInformation.java:895)
at org.apache.hadoop.security.UserGroupInformation.getLoginUser(UserGroupInformation.java:861)
at org.apache.hadoop.security.UserGroupInformation.getCurrentUser(UserGroupInformation.java:728)
at org.apache.hadoop.mapreduce.task.JobContextImpl.(JobContextImpl.java:72)
at org.apache.hadoop.mapreduce.Job.(Job.java:145)
at org.apache.hadoop.mapreduce.Job.getInstance(Job.java:188)
at com.michael.Bigdata_01.mapreduce.wc.WordCountApp.main(WordCountApp.java:38)

Answer 1

Michael_PK 2019-02-26 09:38:32

Google下window MapReduce开发的，下载一个插件，HADOOP_HOME or hadoop.home.dir are not set.把这个参数设置下。

Answer 2

提问者 Micheal0508 2019-02-26 09:40:58

解决方案是在本地windows见一个hapood/bin的文件夹把群文件的一个.exe文件放进去就行了……不知道原理……也不知道后面会不会继续报错

• Michael_PK #1

  win就要求这样的，所以我一般都是Mac，不用win