idea执行mapreduce报错 Could not locate Hadoop executable: C:\hadoop-3.1.1\bin\winutils.exe

　　window执行mapreduce报错　　

Exception in thread "main" java.lang.RuntimeException: java.io.FileNotFoundException: Could not locate Hadoop executable: C:\hadoop-3.1.1\bin\winutils.exe -see https://wiki.apache.org/hadoop/WindowsProblems
    at org.apache.hadoop.util.Shell.getWinUtilsPath(Shell.java:)
    at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:)
    at org.apache.hadoop.util.Shell.getSetPermissionCommand(Shell.java:)
    at org.apache.hadoop.fs.RawLocalFileSystem.setPermission(RawLocalFileSystem.java:)
    at org.apache.hadoop.fs.RawLocalFileSystem.mkOneDirWithMode(RawLocalFileSystem.java:)
    at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:)
    at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:)
    at org.apache.hadoop.fs.RawLocalFileSystem.mkdirsWithOptionalPermission(RawLocalFileSystem.java:)
    at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:)
    at org.apache.hadoop.fs.FilterFileSystem.mkdirs(FilterFileSystem.java:)
    at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:)
    at org.apache.hadoop.mapreduce.JobSubmissionFiles.getStagingDir(JobSubmissionFiles.java:)
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:)
    at org.apache.hadoop.mapreduce.Job$.run(Job.java:)
    at org.apache.hadoop.mapreduce.Job$.run(Job.java:)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:)
    at com.venn.demo.WordCount.main(WordCount.java:)
Caused by: java.io.FileNotFoundException: Could not locate Hadoop executable: C:\hadoop-3.1.\bin\winutils.exe -see https://wiki.apache.org/hadoop/WindowsProblems
    at org.apache.hadoop.util.Shell.getQualifiedBinInner(Shell.java:)
    at org.apache.hadoop.util.Shell.getQualifiedBin(Shell.java:)
    at org.apache.hadoop.util.Shell.<clinit>(Shell.java:)
    at org.apache.hadoop.util.StringUtils.<clinit>(StringUtils.java:)
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:)
    at org.apache.hadoop.fs.FileSystem$Cache$Key.<init>(FileSystem.java:)
    at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:)
    at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:)
    at com.venn.util.HdfsUtil.isPathExist(HdfsUtil.java:)
    at com.venn.util.HdfsUtil.handleOutPutPath(HdfsUtil.java:)
    at com.venn.demo.WordCount.main(WordCount.java:)

注： C:\hadoop-3.1.1 是配置的 HADOOP_HOME 路径

　　下载对应版本的 winutils.exe，放到  路径：  C:\hadoop-3.1.1\bin\   下。

　　然后，你会发现又有个新的bug。O(∩_∩)O哈哈~　　　

Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z
    at org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Native Method)
    at org.apache.hadoop.io.nativeio.NativeIO$Windows.access(NativeIO.java:640)
    at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:1223)
    at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:160)
    at org.apache.hadoop.util.DiskChecker.checkDirInternal(DiskChecker.java:100)
    at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:77)
    at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:315)
    at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:378)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:152)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:133)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:117)
    at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:124)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:172)
    at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:788)
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:254)
    at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1570)
    at org.apache.hadoop.mapreduce.Job$11.run(Job.java:1567)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:422)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1729)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1567)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1588)
    at com.venn.demo.WordCount.main(WordCount.java:77)

　　再下载个对应版本的 hadoop.ddl ，放到  C:\Windows\System32  ，就搞定了

　　一般来说， winutils.exe 和 hadoop.ddl 同一个大版本应该都可以