Alert: ignore long locked inactive cache entry

[anish10dec]

Hi Team,

Intermittently there are multiple below errors reported in error.log file.

[alert] 41456#41456: ignore long locked inactive cache entry
efcd5613750302a2657fca63c07fc777, count:1

This comes  momentarily with a spike of 50-90 K such errors in a minute time
span. 

During this period server load and cpu utilization increases to Maximum
dropping all the traffic with 0% Idle CPU and Load rising to more than 100.

This happens for 5 min after which server comes back into normal state.

Please help What causes this alert and how to avoid this scenario

Posted at Nginx Forum: https://forum.nginx.org/read.php?2,291199,291199#msg-291199