hadoop报错：HADOOP_HOME and hadoop.home.dir are unset. 解决方法

墨蓝 2022-09-14 08:44 873阅读 0赞

### 目录 ###

*  报错信息
 *  解决方法
 *   *  1.下载apache-hadoop-3.1.0-winutils-master
     *  2.解压到宿主机
     *  3.添加环境变量
     *  4.重启IDEA或eclipse

# 报错信息 #

java.lang.RuntimeException: java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP\_HOME and hadoop.home.dir are unset.

java.lang.RuntimeException: java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. -see https://wiki.apache.org/hadoop/WindowsProblems
    
    	at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:737)
    	at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:272)
    	at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:288)
    	at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:840)
    	at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.<init>(RawLocalFileSystem.java:239)
    	at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream.<init>(RawLocalFileSystem.java:219)
    	at org.apache.hadoop.fs.RawLocalFileSystem.createOutputStreamWithMode(RawLocalFileSystem.java:318)
    	at org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:307)
    	at org.apache.hadoop.fs.RawLocalFileSystem.create(RawLocalFileSystem.java:338)
    	at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSOutputSummer.<init>(ChecksumFileSystem.java:401)
    	at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:464)
    	at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:443)
    	at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1118)
    	at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:1098)
    	at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:987)
    	at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:414)
    	at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:387)
    	at org.apache.hadoop.fs.FileUtil.copy(FileUtil.java:337)
    	at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2434)
    	at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2403)
    	at org.apache.hadoop.fs.FileSystem.copyToLocalFile(FileSystem.java:2379)
    	at cn.itcast.hdfs.HDFSClientTest.getFile2Local(HDFSClientTest.java:71)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    	at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
    	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
    	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
    	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
    	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
    	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
    	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
    	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
    	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
    	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    	at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    	at com.intellij.rt.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:33)
    	at com.intellij.rt.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:230)
    	at com.intellij.rt.junit.JUnitStarter.main(JUnitStarter.java:58)
    Caused by: java.io.FileNotFoundException: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset. -see https://wiki.apache.org/hadoop/WindowsProblems
    	at org.apache.hadoop.util.Shell.fileNotFoundException(Shell.java:549)
    	at org.apache.hadoop.util.Shell.getHadoopHomeDir(Shell.java:570)
    	at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:593)
    	at org.apache.hadoop.util.Shell.<clinit>(Shell.java:690)
    	at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:78)
    	at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:3482)
    	at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:3477)
    	at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:3319)
    	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:479)
    	at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:227)
    	at cn.itcast.hdfs.HDFSClientTest.connect2HDFS(HDFSClientTest.java:31)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    	at java.base/java.lang.reflect.Method.invoke(Method.java:564)
    	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
    	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
    	at org.junit.internal.runners.statements.RunBefores.invokeMethod(RunBefores.java:33)
    	at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:24)
    	... 18 more
    Caused by: java.io.FileNotFoundException: HADOOP_HOME and hadoop.home.dir are unset.
    	at org.apache.hadoop.util.Shell.checkHadoopHomeInner(Shell.java:469)
    	at org.apache.hadoop.util.Shell.checkHadoopHome(Shell.java:440)
    	at org.apache.hadoop.util.Shell.<clinit>(Shell.java:517)
    	... 34 more

# 解决方法 #

## 1.下载apache-hadoop-3.1.0-winutils-master ##

[apache-hadoop-3.1.0-winutils-master github地址][apache-hadoop-3.1.0-winutils-master github].  
其他版本也可以在github上找到，我这里用该版本解决问题。

## 2.解压到宿主机 ##

我这里是解压到本地windows下的。  
解压下来apache-hadoop-3.1.0-winutils-master文件夹下面包含bin文件  
![在这里插入图片描述][8af8603c25894dabb65f574640ddc5b4.png]

## 3.添加环境变量 ##

将bin文件夹的父文件夹的路径添加到环境变量  
![在这里插入图片描述][watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAVFEy_size_20_color_FFFFFF_t_70_g_se_x_16]

## 4.重启IDEA或eclipse ##

问题解决。

[apache-hadoop-3.1.0-winutils-master github]: https://github.com/s911415/apache-hadoop-3.1.0-winutils.git
[8af8603c25894dabb65f574640ddc5b4.png]: /images/20220828/804bcc6519ff476db335f77fa815269b.png
[watermark_type_ZHJvaWRzYW5zZmFsbGJhY2s_shadow_50_text_Q1NETiBAVFEy_size_20_color_FFFFFF_t_70_g_se_x_16]: /images/20220828/8a563ac427324bc28a7d36ea5bdc5259.png