NOTICE [157.55.35.*:12397-0#APVH_*****.com] No request delivery notification has been received from LSAPI process group [-1], possible run away process. NOTICE [157.55.35.*:12397-0#APVH_*****.com] Retry with new process group. I have noticed website downtime and found those log entries all over the place. When this issue happens, every PHP page would take longer and longer time to process and in the end all pages will timed out. This is a cPanel server with CloudLinux for shared hosting, lots of websites but load is fine, around 1-2 during busy hours, and it shouldn't be a script issue because all php pages, no matter what script users are running, have the same issue. Static files are all fine while all PHP pages are down. Switched to Apache for 5 days, working without any issue. If switched to Litespeed, this issue will show up after litespeed running few hours or one day. Upgraded to lastest verison, still the same. Can anyone help me which aspect should I look into? Thank you.