Exception in thread "main" java.lang.UnsatisfiedLinkError: org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String;I)Z


1、window操作系統的eclipse運行wordcount程序出現如下所示的錯誤:

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$Windows.access(NativeIO.java:570)
    at org.apache.hadoop.fs.FileUtil.canRead(FileUtil.java:977)
    at org.apache.hadoop.util.DiskChecker.checkAccessByFileMethods(DiskChecker.java:173)
    at org.apache.hadoop.util.DiskChecker.checkDirAccess(DiskChecker.java:160)
    at org.apache.hadoop.util.DiskChecker.checkDir(DiskChecker.java:94)
    at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.confChanged(LocalDirAllocator.java:285)
    at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:344)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)
    at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:115)
    at org.apache.hadoop.mapred.LocalDistributedCacheManager.setup(LocalDistributedCacheManager.java:131)
    at org.apache.hadoop.mapred.LocalJobRunner$Job.<init>(LocalJobRunner.java:163)
    at org.apache.hadoop.mapred.LocalJobRunner.submitJob(LocalJobRunner.java:731)
    at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:432)
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1285)
    at org.apache.hadoop.mapreduce.Job$10.run(Job.java:1282)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Unknown Source)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1614)
    at org.apache.hadoop.mapreduce.Job.submit(Job.java:1282)
    at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1303)
    at com.bie.hadoop.wordcount.WordCountRunner2.run(WordCountRunner2.java:54)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
    at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
    at com.bie.hadoop.wordcount.WordCountRunner2.main(WordCountRunner2.java:60)

 暫時解決方法如下所示:

Windows的唯一方法用於檢查當前進程的請求,在給定的路徑的訪問權限,所以我們先給以能進行訪問,我們自己先修改源代碼,return true 時允許訪問。我們下載對應hadoop源代碼,hadoop-2.6.0-src.tar.gz解壓,D:\biexiansheng\hadoop\hadoop-2.5.0-cdh5.3.6-src\hadoop-2.5.0-cdh5.3.6\hadoop-common-project\hadoop-common\src\main\java\org\apache\hadoop\io\nativeio下NativeIO.java 復制到對應的Eclipse的project,然后修改557行為return true如圖所示:

注意:包的路徑必須這樣,不能變:

 


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