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Unable to establish debug connection to localhost

Forum|Forum|3 years ago
April 19, 2022
5 replies
3875 views

Hi,

I have installed crx-quickstart.jar in my local. localhost:4502/aem/start.html is up and running.

When i try to connect to the server in the debug mode from eclipse, it throws following error:

could not establish debug connection to localhost : 30303
Failed to connect to remote VM. Connection refused.
Connection refused: connect

Eclipse is running in AEM Perspective

When I connect to server in run mode it's all good.

Connection Details:

Port: 4502

DebugPort: 30303

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Best answer by Anish-Sinha

Hi @schallag ,

Start your AEM instance using command-prompt/terminal using below command

java -Xmx512m -agentlib:jdwp=transport=dt_socket,address=30303,server=y,suspend=n -jar cq-author-p4502.jar -Dsling.run.modes=author -nofork

Once the server is up then try to connect to the port 30303 and it will connect.

Anish-Sinha

Accepted solution

Adobe Employee

Hi @schallag ,

Start your AEM instance using command-prompt/terminal using below command

java -Xmx512m -agentlib:jdwp=transport=dt_socket,address=30303,server=y,suspend=n -jar cq-author-p4502.jar -Dsling.run.modes=author -nofork

Once the server is up then try to connect to the port 30303 and it will connect.

S

schallagAuthor

Level 2

Thank you. It worked.

Ritesh_Mittal

Community Advisor and Adobe Champion

Hi @schallag ,

You can either enable debug mode from the command prompt while running the JAR or change the JVM opts in the start batch file. Both options have been described below-

https://rashidjorvee.blogspot.com/2018/12/how-to-start-aem-in-debug-mode.html

https://experienceleague.adobe.com/docs/experience-cloud-kcs/kbarticles/KA-17459.html?lang=en

S

schallagAuthor

Level 2

Thank You

DEBAL_DAS

New Member

Please refer the below details and update the port number as per your need -

Go to bin folder in crx-quickstart and change the line 25 in start.bat by adding the highlighted part here (address port number can be any number of your choice)

if not defined CQ_JVM_OPTS set CQ_JVM_OPTS=-Xmx1024m -XX:MaxPermSize=256M -Djava.awt.headless=true -Xrunjdwp:transport=dt_socket,server=y,suspend=n,address=10123

Change line no. 44 by adding this

set CQ_RUNMODE=%CQ_RUNMODE%,crx3,crx3tar,debug

Save the file.

Once saved open the command prompt, go to \crx-quickstart\bin and type “start.bat”, once it’s done you’ll see another window of cmd being opened and the server will start in debug mode as seen below

Check if the server is started or not by opening localhost:4502 in the browser

Setting up the debug config in eclipse

Go to Run -> Debug Configurations -> Remote Java Application

Set up a new configuration like seen below by selecting the project (mostly it’ll be core) and click Debug

Check if Debug is working fine or not by having the Debug view

Eclipse by default will suspend execution on uncaught exceptions which will debug the code which we haven’t even selected. This will waste our time. So please do this to avoid it

Go to Windows - > Preferences -> Java -> Debug and uncheck “Suspend execution on uncaught exceptions”