[users@httpd] Failed to acquire SSL session cache lock

This problem occurs after 1-3 days of apache start. After restarting apache, the error / warning does not occur again, but after some time or several days, the error occurs again. Until now I did not know what the cause of the error are. Here is the error log, I got ssl:warn on my error log: I

[users@httpd] Failed to acquire SSL session cache lock

This problem occurs after 1-3 days of apache start. After restarting apache, the error / warning does not occur again, but after some time or several days, the error occurs again. Until now I did not know what the cause of the error are. Here is the error log, I got ssl:warn on my error log: I

[users@httpd] Failed to acquire SSL session cache lock apache2.4

This problem occurs after 1-3 days of apache start. After restarting apache, the error / warning does not occur again, but after some time or several days, the error occurs again. Until now I did not know what the cause of the error are. Here is the error log, I got ssl:warn on my error log: [

[users@httpd] Failed to acquire SSL session cache lock apache2.4 on Ubuntu 18.04

Please help to solve this issue. This problem occurs after 1-3 days of apache start. After restarting apache, the error / warning does not occur again, but after some time or several days, the error occurs again. Until now I did not know what the cause of the error are. Here is the error log, I