hadoop报错org.apache.hadoop.io.nativeio.NativeIO$Windows.access0(Ljava/lang/String；I)Z

项目场景：

做一个数据统计

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问题描述

运行job时报错org.apache.hadoop.io.nativeio.NativeIO$Windows.access0

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)

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原因分析：

下载链接：https://github.com/steveloughran/winutils/blob/master/hadoop-3.0.0/bin/hadoop.dll

hadoop.dll缺失

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解决方案：

在windows下的system32中放入Hadoop.dll