JRebel has changed the way developers code in Java. Never again will you need to redeploy your application to see the impact of code updates. Make changes and JRebel applies them instantly to your running application.

Step 1: Download Jrebel from eclipse marketplace..

In Eclipse navigate to HELP>> Eclipse MarketPlace And Serach for Jrebel and Install

Step 2: Get licence key by registering here https://my.jrebel.com/

Step 3: In Eclipse navigate to HELP>> JRebel Config center >> Activation And activate the JRebel

Step 4: In Eclipse navigate to HELP>> JRebel Config center >> OverView

Step 5: Add server by checking the checkbox as shown below

Step 6: Add liferay portlet project by checking the checkbox as shown below

OR alternatively you can add project by Right click on portlet project and Add Jrebel Nature as shown

Find newly created jrebel nature here--> . docroot >> WEB-INF >> src >> rebel.xml

Step 7: In Eclipse navigate to HELP>> JRebel Config center >> Plug -Ins And select liferay in plugins as shown

Step 8: Double click on server And in Publishing section make sure that " Never publish automatically" is selected And in JRebel section enable jrebel agent as shown below