Exception in thread "main" java.lang.IllegalArgumentException: Wrong FS: hdfs://node1:9000/input/pia

在Windows本地开发时遇到这样的问题：

Exception in thread "main" java.lang.IllegalArgumentException: Wrong FS: hdfs://node1:9000/input/piao.txt, expected: file:///
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:643)
at org.apache.hadoop.fs.RawLocalFileSystem.pathToFile(RawLocalFileSystem.java:80)
at org.apache.hadoop.fs.RawLocalFileSystem.deprecatedGetFileStatus(RawLocalFileSystem.java:519)
at org.apache.hadoop.fs.RawLocalFileSystem.getFileLinkStatusInternal(RawLocalFileSystem.java:737)
at org.apache.hadoop.fs.RawLocalFileSystem.getFileStatus(RawLocalFileSystem.java:514)
at org.apache.hadoop.fs.FilterFileSystem.getFileStatus(FilterFileSystem.java:397)
at org.apache.hadoop.fs.ChecksumFileSystem$ChecksumFSInputChecker.<init>(ChecksumFileSystem.java:140)
at org.apache.hadoop.fs.ChecksumFileSystem.open(ChecksumFileSystem.java:341)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:764)
at com.ibeifeng.hadoop.senior.hdfs.HdfsApp.main(HdfsApp.java:36)

部分代码：

String fileName = "hdfs://node1:9000/input/piao.txt";

Path readPath = new Path(fileName);

fileSystem.open(readPath);

FSDataInputStream inputStream = fileSystem.open(readPath);

问题的解决：

1，首先检查访问服务器的路径是否正确：hdfs://node1:9000/input/piao.txt。

2，因为本地连接服务器开发，本地的Eclipse中需要服务器中的两个配置文件：core-site.xml 和hdfs.site.xml

但是修改完了，再次运行，结果还是报错：

Exception in thread "main" java.lang.IllegalArgumentException: Wrong FS: hdfs://node1:9000/input/piao.txt, expected: hdfs://node1:8020
at org.apache.hadoop.fs.FileSystem.checkPath(FileSystem.java:643)
at org.apache.hadoop.hdfs.DistributedFileSystem.getPathName(DistributedFileSystem.java:184)
at org.apache.hadoop.hdfs.DistributedFileSystem.access$000(DistributedFileSystem.java:101)
at org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:293)
at org.apache.hadoop.hdfs.DistributedFileSystem$3.doCall(DistributedFileSystem.java:289)
at org.apache.hadoop.fs.FileSystemLinkResolver.resolve(FileSystemLinkResolver.java:81)
at org.apache.hadoop.hdfs.DistributedFileSystem.open(DistributedFileSystem.java:289)
at org.apache.hadoop.fs.FileSystem.open(FileSystem.java:764)
at com.ibeifeng.hadoop.senior.hdfs.HdfsApp.main(Hdfs
4000
App.java:35)

这里的端口需要将9000 改成8020 ，即：hdfs://node1:8020/input/piao.txt 

于是就可以愉快的跑起来了。