内容源自:https://blog.csdn.net/u014470581/article/details/51480600

报错信息:

Exception in thread "main" java.lang.reflect.InvocationTargetException  
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)  
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)  
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)  
        at java.lang.reflect.Method.invoke(Method.java:601)  
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:58)  
Caused by: java.lang.IllegalArgumentException: Wrong FS: hdfs:/, expected: file:///  
        at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:642)  
        at org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:69)  
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:419)  
        at org.apache.hadoop.fs.ChecksumFileSystem.mkdirs(ChecksumFileSystem.java:584)  
        at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:437)  
        at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:424)  
        at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:905)  
        at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:886)  
        at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:783)  
        at com.ailk.hadoopdemo.DFSOperator.main(DFSOperator.java:22)  
        ... 5 more  
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