401 Unauthorized error while logging in Manager-App of Tomcat

Question

I am trying to log in to the Manager App in Tomcat 7.0.22 for Mac OS X 10.7. Here is the error I am getting: http://f.cl.ly/items/421q1K3f1i0X1H1M181v/so.tiff

Answer 1

I also encountered this problem. The content of my tomcat-users.xml was correct, but the file was not readable by Tomcat. I changed the file's group to tomcat7, restarted Tomcat, and voilà!

Here's the content of my tomcat-users.xml: