Eclipse not Detecting Attempt to Upgrade from Luna to Mars

Solution 1:

1. Add the following sources to your available software list (Window > Preferences > Install/Update > Available Software Sites > Add):
   • http://download.eclipse.org/releases/mars/
   • http://download.eclipse.org/eclipse/updates/4.5

2. Remove the old sources (http://download.eclipse.org/releases/luna/ and http://download.eclipse.org/eclipse/updates/4.4).

3. Go to Help > Install New Software and select http://download.eclipse.org/eclipse/updates/4.5 from the Work with: dropdown. It should be called The Eclipse Project Updates.

4. Tick Eclipse Java Development Tools > Eclipse Java Development Tools and Eclipse Platform > Eclipse Platform and then click Next. See the following image (yours won't be greyed out - I've already upgraded).

5. On the next screen, you may be asked to remove out of date plugins (due to broken / missing dependencies).

6. Your will be prompted to restart Eclipse. When it restarts, you will be greeted with an Eclipse Mars splash screen.

Solution 2:

I never did resolve this issue, so I downloaded the new version of Eclipse and reinstalled everything. Since doing so, other issues that I have had with Eclipse in the past that I previously ignored seem to have been resolved.