[2630] Run nuxt start by pm2 start -i max npm -- start have error

env:

Using nginx as a reverse proxy Nuxt ^1.0.0-rc9

start

 pm2 start -i max npm -- start

when i start by pm2, i get error :

I use ab test website

ab -n 5000 -c 10 http://**/

when completed 1500 requests, process will block, as below