Issue DOWN: domain.com is offline ([7] Couldn't connect to server (Failed to connect to fashiondreams.ee port 443: Connection refused))

[Raudpats]

Server operating system version

CentOS Linux 7.9.2009 (Core)

Plesk version and microupdate number

Plesk Obsidian v18.0.71_build1800250717.15 os_CentOS 7

Hi! Can someone help me!

The server crashes from time to time - often for just a few seconds to a few minutes. 360 monitoring sends me a message: DOWN: fashiondreams.ee is offline ([7] Couldn't connect to server (Failed to connect to fashiondreams.ee port 443: Connection refused))
Some days more often, some less often.
What could cause this error?

Heiki

 

[Sebahat.hadzhi]

Hello, Heiki. A good starting point will be to review the Apache logs in /var/log/httpd/error_log. The reason for the server going could vary - maxing the resources, a potential DDoS attack, etc. Please let us know what's being logged around the time you are experiencing the issue.

 

[Raudpats]

Hello, Heiki. A good starting point will be to review the Apache logs in /var/log/httpd/error_log. The reason for the server going could vary - maxing the resources, a potential DDoS attack, etc. Please let us know what's being logged around the time you are experiencing the issue.

[7] Couldn't connect to server (Failed to connect to fashiondreams.ee port 443: Connection refused)
default Opened on Mon, Jul 28 '25, 15:42 closed on Mon, Jul 28 '25, 15:48 UTC
Mon Jul 28 15:41:29.169061 2025] [ssl:warn] [pid 8022:tid 140356108646144] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon Jul 28 15:41:29.169081 2025] [ssl:warn] [pid 8022:tid 140356108646144] (22)Invalid argument: AH02027: Failed to release SSL session cache lock
[Mon Jul 28 15:41:29.678159 2025] [ssl:warn] [pid 7944:tid 140356133824256] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon Jul 28 15:41:29.678182 2025] [ssl:warn] [pid 7944:tid 140356133824256] (22)Invalid argument: AH02027: Failed to release SSL session cache lock
[Mon Jul 28 15:41:29.682905 2025] [ssl:warn] [pid 8022:tid 140356091860736] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon Jul 28 15:41:29.682926 2025] [ssl:warn] [pid 8022:tid 140356091860736] (22)Invalid argument: AH02027: Failed to release SSL session cache lock
[Mon Jul 28 15:41:29.736419 2025] [ssl:warn] [pid 8022:tid 140356075075328] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon Jul 28 15:41:29.736443 2025] [ssl:warn] [pid 8022:tid 140356075075328] (22)Invalid argument: AH02027: Failed to release SSL session cache lock
[Mon Jul 28 15:43:13.675212 2025] [ssl:warn] [pid 7944:tid 140356279637760] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon Jul 28 15:43:13.675276 2025] [ssl:warn] [pid 7944:tid 140356279637760] (22)Invalid argument: AH02027: Failed to release SSL session cache lock
[Mon Jul 28 15:43:15.861271 2025] [ssl:warn] [pid 8022:tid 140356041504512] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon Jul 28 15:43:15.861351 2025] [ssl:warn] [pid 8022:tid 140356041504512] (22)Invalid argument: AH02027: Failed to release SSL session cache lock
[Mon Jul 28 15:43:16.283575 2025] [ssl:warn] [pid 8022:tid 140356024719104] (22)Invalid argument: AH02026: Failed to acquire SSL session cache lock
[Mon

Thanks for helping

Heiki