Nginx failure with Webshield: Update to ea-nginx-1.26.3-4 led to "failed (98: Address already in use)"

Issue

Following the update of ea-nginx to version ea-nginx-1.26.3-4.el*.cloudlinux.1.1, servers with Imunify360 installed may encounter instances of the Nginx service becoming unavailable due to this or a related error:

# systemctl status nginx.service
● nginx.service - nginx - high performance web server
Loaded: loaded (/usr/lib/systemd/system/nginx.service; enabled; vendor preset: disabled)
Active: failed (Result: exit-code) since Tue 2025-05-20 01:11:00 +01; 32s ago
Docs: http://nginx.org/en/docs/
Process: 46772 ExecStart=/usr/sbin/nginx -c /etc/nginx/nginx.conf (code=exited, status=1/FAILURE)

        May 20 09:14:47 example.com nginx[35476]: nginx: [emerg] bind() to 0.0.0.0:52229 failed (98: Address already in use)
        May 20 09:14:47 example.com nginx[35476]: nginx: [emerg] bind() to [::]:52229 failed (98: Address already in use)
        May 20 09:14:47 example.com nginx[35476]: nginx: [emerg] bind() to 0.0.0.0:52231 failed (98: Address already in use)
        May 20 09:14:47 example.com nginx[35476]: nginx: [emerg] bind() to [::]:52231 failed (98: Address already in use)


tcp        0      0 0.0.0.0:52227           0.0.0.0:*               LISTEN      0          2017792709 36644/im360: master
tcp        0      0 0.0.0.0:52229           0.0.0.0:*               LISTEN      0          2017792710 36644/im360: master
tcp        0      0 0.0.0.0:52231           0.0.0.0:*               LISTEN      0          2017792711 36644/im360: master

Environment

• Imunify360
• Webshield
• ea-nginx-1.26.3-4

Solution

Update the package to the most recent version:

yum update ea-nginx --enablerepo=cloudlinux-ea4-rollout-11-bypass

Cause

Product issue DEF-34054.

Useful links

• Imunify360 Status Page | Incident Report: Upgrade to latest ea-nginx package causing service down