If it's still not found, double check the requisites (such as the Java vm version).
While most times things work as explained, some users may have messages such as: Unable to load the repository Unknown Host: means there's some issue accessing the update site in your current connection.
After downloading the zip file: Extract the contents of the zip file in the eclipse/dropins folder and restart Eclipse.
If it doesn't work, try restarting Eclipse with the -clean flag (if you're a regular user and installing with admin, make sure you call -clean logged in as admin, so that Eclipse finds out about it).
For example, it is possible to unzip or copy artifacts or to set file permissions.
Once your IDE restarts, the JRebel plugin will notify you about this.You will also be asked to accept the JRebel License Agreement.Your IDE will restart once the installation is finished.So as long as the application is running and it has enough memory the information is cached.instructions.configure=\ add Repository(type:0,location:http$//download.eclipse.org/eclipse/updates/4.5,name: Eclipse Mars Update Site);\ add Repository(type:1,location:http$//download.eclipse.org/eclipse/updates/4.5,name: Eclipse Mars Update Site); The Eclipse p2 functionality invokes actions (touchpoints) when an installable unit is installed, configured, or uninstalled.