hadoop运行报错Wrong FS: hdfs:/, expected: file:///

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:)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:)
        at java.lang.reflect.Method.invoke(Method.java:)
        at org.eclipse.jdt.internal.jarinjarloader.JarRsrcLoader.main(JarRsrcLoader.java:)
Caused by: java.lang.IllegalArgumentException: Wrong FS: hdfs:/, expected: file:///
        at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:)
        at org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:)
        at org.apache.hadoop.fs.RawLocalFileSystem.mkdirs(RawLocalFileSystem.java:)
        at org.apache.hadoop.fs.ChecksumFileSystem.mkdirs(ChecksumFileSystem.java:)
        at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:)
        at org.apache.hadoop.fs.ChecksumFileSystem.create(ChecksumFileSystem.java:)
        at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:)
        at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:)
        at org.apache.hadoop.fs.FileSystem.create(FileSystem.java:)
        at com.ailk.hadoopdemo.DFSOperator.main(DFSOperator.java:)
        ...  more  

解决方法一：

mapreduce class添加：把core-site.xml的路径添加进去：

conf.addResource(new Path("/home/hadoop/conf/core-site.xml"));

解决方法二：

把hadoop集群上的core-site.xml和hdfs-site.xml放到工程的src目录下/resource下