Eclipse Mars - eclipse.org.equinox.p2.core.provisionexception

Question

I installed eclipse mars on my Windows 8.1 Pro PC and its update site below

Mars

http://download.eclipse.org/releases/mars

Eclipse Project Updates

http://download.eclipse.org/eclipse/updates/4.5

but when I try to restart, it occurs after

No repository found at http://download.eclipse.org/releases/mars. eclipse.org.equinox.p2.core.ProvisionException 

I tried the following solutions, but no one works for me.

• added -Djava.net.preferIPv4Stack=true in eclipse.ini

• changed on leadership

• Uncheck "contact all software sites during installation to find the required software" when installing new software

Note. Firewall disabled

Answer 1

This is a search error, see Error 470900 - Eclipse Mars repository for EPP related issues and Error 471528 - No repository found
Just remove the following:
$HOME/.eclipse/org.eclipse.oomph.p2/cache !

in the windows:

C:\Users\yourusername\.eclipse\org.eclipse.oomph.p2\cache

Answer 2

Just try the same URL without secure encryption of "s" "only http"