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

　　

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