Hadoop on Mac with intellij idea-2 resolving URI errors resulting in permission denied

This article describes how to use filesystem. copyfromlocalfile in intellij idea to operate hadoop. Permission denied is caused by incorrect URI format.

Environment: Mac OS X 10.9.5, intellij idea 13.1.4, hadoop 1.2.1

Hadoop is stored in a virtual machine. The host machine is connected through SSH, And the IDE and data files are stored in the host machine.

The operation code is as follows:

1 public class copyfromlocaltestdriver {2 public static void main (string [] ARGs) {3 configuration = new configuration (); 4 try {5 filesystem = filesystem. get (New uri ("hadoopalice"), configuration); 6 7 path DST = New Path ("/D1 /"); 8 path src = New Path ("/users/Michael/desktop/hadoop/books/easyhadoop .doc"); 9 10 filesystem. copyfromlocalfile (SRC, DST); 11 12 Boolean exists = filesystem. exists (New Path ("/D1/easyhadoop .doc"); 13 system. out. println ("file easyhadoop .doc exists status:" + exists); 14} catch (ioexception e) {15 E. printstacktrace (); 16} catch (urisyntaxexception e) {17 E. printstacktrace (); 18} 19} 20}

Corresponding directories are also available in hadoop.

Prompt for execution

Well, you bullied me. It must be. The previous figure shows that I have access permissions.

Okay, that is to say, the problem should not be on hadoop. Check the code again.

Line 3 of the Code does not seem to comply with the URI rules when constructing a URI. According to section 7 of chapter 7 of "URI section" of elliotte Rusty Harold. Java Network Programming 3rd edition

A URI reference consists of three parts: pattern, pattern-specific, and fragment identifier. The general format is:

Scheme: Scheme-specific-part: Fragment

Compare the filesystem = filesystem. Get (New uri ("hadoopalice"), configuration) in row 5th. If the pattern part is missing, it is a relative Uri. For convenience, add the mode to solve this problem simply and rudely, and continue to learn later.

Filesystem = filesystem. Get (New uri ("HDFS: // hadoopalice: 9000"), configuration );

Run the command again. The result is as follows:

Query hadoop and find that the file is indeed submitted.

 

Hadoop on Mac with intellij idea-2 resolving URI errors resulting in permission denied