node.js processes with the same name in forever are closed when trying to close only one

I am deploying two node.js apps on the aws, the two apps are in the paths shown as ``` /home/ubuntu/nodes/app1/app.js /home/ubuntu/nodes/app2/app.js ``` respectively to run the node.js apps in the background, I used forever to start two apps, so like ``` $ sudo forever start /home/ubuntu/nodes/app1/app.js $ sudo forever start /home/ubuntu/nodes/app2/app.js ``` so forever works well by running the two node.js apps in the background process. However, when I tried to stop one process with forever command like this. ``` $ sudo forever stop /home/ubuntu/nodes/app1/app.js ``` unexpectedly, both node.js process are closed with info like this ``` info: Forever stopped process: data: uid command script forever pid logfile uptime [0] r2pZ /usr/bin/nodejs app.js 24852 24854 /root/.forever/r2pZ.log 0:0:1:14.775 [1] 9f2h /usr/bin/nodejs app.js 24870 24872 /root/.forever/9f2h.log 0:0:0:58.733 ``` I assume it is because two node.js process has the same name - app.js, how to avoid this by close only one process