Change the hadoop project in eclipse to a workspace, and start the task again

I changed the hadoop project in eclipse to a workspace, and when I started the task again, I found that the following exception was reported:

Java code  

1. java.io.IOException: No FileSystem for scheme: hdfs  
2.         at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2421)  
3.         at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2428)  
4.         at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:88)  
5.         at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2467)  
6.         at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2449)  
7.         at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:367)  
8.         at FileCopyToHdfs.readFromHdfs(FileCopyToHdfs.java:65)  
9.         at FileCopyToHdfs.main(FileCopyToHdfs.java:26)  

java.io.IOException: No FileSystem for scheme: hdfs
        at org.apache.hadoop.fs.FileSystem.getFileSystemClass(FileSystem.java:2421)
        at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:2428)
        at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:88)
        at org.apache.hadoop.fs.FileSystem$Cache.getInternal(FileSystem.java:2467)
        at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:2449)
        at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:367)
        at FileCopyToHdfs.readFromHdfs(FileCopyToHdfs.java:65)
        at FileCopyToHdfs.main(FileCopyToHdfs.java:26)

The reason is generally that the jar package hadoop-hdfs.jar is not imported.



After importing the package, re-compile ant, submit the task, and it runs normally!