i am trying to start "cq-author-4502.jar" AEM6.1 , giving below Fatal error

[#1]

i am trying to start "cq-author-4502.jar" AEM6.1 , giving below Fatal error. and also i tried to start using command prompt also same error.

Please help here

[#2 · Accepted solution]

Make sure AEM is not running twice on the same port.

[#3]

Further, to find the process using the port, you can run cmd.exe as admin and run "netstat -abo"

It will have an output like this. The PID is the far right number

  TCP    0.0.0.0:4502          THISPC:0                 LISTENING       2708

[java.exe]

[#4]

Hi,

Looks like the port 4502 is already in use.

You can take a look at the official documentation to see how to change the default port and start over that.