Next JS application fails to load: Checking whether to disconnect long-running connections for process

Symptoms

• Next.js application has been installed

• Trying to load webpage shows "Incomplete response received from application" or "Response received from application"

• Domain logs include:

  3969388/T1 age/Cor/CoreMain.cpp:1146: Checking whether to disconnect long-running connections for process 3996609, application /var/www/vhosts/example.com/httpdocs (production)

Cause

Nginx does not automatically route requests to the Next.js application

Resolution

1. Log into Plesk

2. Go to Domains > example.com > Hosting & DNS > Apache & Nginx Settings

3. Disable Proxy mode

4. Add the following in Additional nginx directives

   location / {
   proxy_set_header X-Forwarded-For $remote_addr;
   proxy_set_header Host $http_host;
   proxy_pass http://127.0.0.1:3000;
   }

5. Press Apply