High Load/Hanging Cleanup Processes After liblsapi/mod_lsapi 1.1.85 Upgrade

Issue

After upgrading liblsapi and the corresponding mod_lsapi package to version 1.1.85 (on non-cPanel servers) or `ea-apache24-mod_lsapi`(on cPanel servers), the new lsphp socket cleanup routine may cause stacked lsof processes and increased system load. This issue is particularly noticeable on servers hosting many domains.

Environment

• liblsapi-1.1-85
• ea-apache24-mod_lsapi-1.1-85
• mod_lsapi-1.1-85 (for non-cPanel servers)

Solution

The fix version liblsapi 1.1-86 and the corresponding mod_lsapi 1.1-86 (for non-cPanel servers) or ea-apache24-mod_lsapi 1.1-86 (for cPanel servers) have been released. To apply the update, please use the appropriate command based on your server type:

• For cPanel servers:

yum update ea-apache24-mod_lsapi

• For non-cPanel servers:

yum update mod_lsapi

Cause

The processes are part of a new cleanup routine introduced in mod_lsapi 1.1.85 / liblsapi 1.1.85. This script runs when Apache or mod_lsapi restarts to clean up old lsphp sockets, but on servers with many domains, the lsof checks take longer, causing stacked processes.

Useful links

• https://changelog.cloudlinux.com/search?value=MAXWS-655