"Big Data series" under Windows to connect to the Hadoop environment under Linux for development

First, download Eclipse and install two, download the Exlipse Hadoop plugin three, open the map reduce view

Window---perspective-perspective Open

Iv. Editing the Hadoop location

V. To see if the connection is successful

VI. Upload a file or folder test is successful

1, no permission permission denied

Key line of code: When executing Login.login, the Hadooploginmodule method in Hadoop is called, and the key is in the Commit method, it takes precedence to read the HADOOP_USER_NAME system environment variables. Then there is the Java environment variable, and if not, it gets from the Ntuserprincipal. Because Hadoop_user_name was not previously configured, it gets to the current user of my Windows system.

if (!issecurityenabled () && (user = = null)) {  String envuser = system.getenv (hadoop_user_name);  if (Envuser = = null) {    Envuser = System.getproperty (hadoop_user_name);  }  user = Envuser = = null? Null:new User (envuser);}

Above solution reference from: http://blog.csdn.net/xiaoshunzi111/article/details/52062640

"Big Data series" under Windows to connect to the Hadoop environment under Linux for development