How do we debug our application running in a remote (or local) AEM server?


To debug a CQ5 application, you can use java remote debugging.

Warning: Do not enable remote debugging in your production environment unless it necessary as it could greatly affect your application performance.

Step 1: Add the Remote Debugging JVM Parameter

  1. To use remote debugging, you must start AEM with this JVM parameter:

You can add the parameter by doing any of the following:

  • Add it to your crx-quickstart/bin/start script CQ_JVM_OPTS environment variable (so your server always starts in debug mode).
  • Include it as a parameter when starting AEM with java -jar directly. For example, java -Xmx512m -agentlib:jdwp=transport=dt_socket,address=8000,server=y,suspend=n -jar cq-author-4502.jar


  • If necessary, you can change the port defined under "...,address=8000,..." from 8000 to something that works better in your environment.
  • If you notice that it isn't working, avoid forking the java process by specifying the -nofork command line option.
  • The start script is located under crx-quickstart/server for CQ versions < 5.5

Step 2: Start a remote debugging session

To start a remote debugging session from Eclipse, do the following:

  1. Open Eclipse.
  2. Choose Run > Debug Configurations.
  3. Right-click Remote Java Applications and select New.
  4. Select your CQ5 project under Project.
  5. Type in the port from the "address" configuration of the jvm parameter defined above. In the example, it is port 8000 (and the host name of the machine you are connecting to, most likely localhost)
  6. To start a debugging session, double-click your new configuration in the Debug Configurations screen after saving it.

Applies to:  Adobe Experience Manager 6.x

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