- 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
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$LocalFSFileOutputStream.解决方法 1.下载apache-hadoop-3.1.0-winutils-master(RawLocalFileSystem.java:239) at org.apache.hadoop.fs.RawLocalFileSystem$LocalFSFileOutputStream. (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. (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. (Shell.java:690) at org.apache.hadoop.util.StringUtils. (StringUtils.java:78) at org.apache.hadoop.fs.FileSystem$Cache$Key. (FileSystem.java:3482) at org.apache.hadoop.fs.FileSystem$Cache$Key. (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. (Shell.java:517) ... 34 more
apache-hadoop-3.1.0-winutils-master github地址.
其他版本也可以在github上找到，我这里用该版本解决问题。
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
将bin文件夹的父文件夹的路径添加到环境变量
问题解决。
