Issue Dr.Web Updater can not send HUP signal to Dr.Web daemon

[yaswaka]

Server operating system version

AlmaLinux8.1.0

Plesk version and microupdate number

18.0.73 Update3

Is this just a network common issue?
For the past few days, I've been seeing this message.
The error message is attached.

Thanks.

 

[Sebahat.hadzhi]

Hello, @yaswaka . Could you please run the following command on your server to try obtaining more details:

cat /var/log/messages* | grep drweb

 

[yaswaka]

Hello, @yaswaka . Could you please run the following command on your server to try obtaining more details:

cat /var/log/messages* | grep drweb

Hello, @Sebahat.hadzhi

Thank you for your reply.

The server was down from the evening of 8th November until the morning of 10th November.

DrWeb was not work on the morning of 13th November.

The log was too large, so I have extracted it.

*****************/var/log/messages | grep drweb *********************
.......omit.....
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: Following files have been updated:
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/bases/drwtoday.vdb
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/bases/dwmtoday.vdb
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/bases/dwntoday.vdb
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/bases/dwrtoday.vdb
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/bases/timestamp
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/updates/timestamp
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: ERROR: Dr.Web Updater: can not send HUP signal to Dr.Web daemon (pid=10631, error=No such process) !
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: Dr.Web update details:
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: Update server: http://update.msk.drweb.com/plesk/1100/unix
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: Update has begun at Wed Nov 12 03:36:34 2025
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: Update has finished at Wed Nov 12 03:38:48 2025
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: Following files have been updated:
Nov 12 03:38:48 sub0000551518 drweb-update[118370]: #011/var/drweb/bases/drwtoday.vdb
...............omit........
Nov 13 03:29:20 sub0000551518 update.pl[167503]: update.msk.drweb.com return 200 OK
Nov 13 03:29:20 sub0000551518 update.pl[167503]: request with 382 bytes length was sent to update.msk.drweb.com
Nov 13 03:29:20 sub0000551518 update.pl[167503]: update.msk.drweb.com return 404 Not Found
Nov 13 03:29:20 sub0000551518 update.pl[167503]: request with 377 bytes length was sent to update.msk.drweb.com
Nov 13 03:29:20 sub0000551518 update.pl[167503]: update.msk.drweb.com return 200 OK
Nov 13 03:29:20 sub0000551518 update.pl[167503]: Generated file path: /var/drweb/updater/drweb/data/
Nov 13 03:29:20 sub0000551518 update.pl[167503]: Generated file path: /var/drweb/updater/drweb/data/
Nov 13 03:29:20 sub0000551518 update.pl[167503]: Generated file path: /var/drweb/updater/drweb/diff
Nov 13 03:29:20 sub0000551518 update.pl[167503]: Generated file path: /var/drweb/updater/drweb/data/
Nov 13 03:29:20 sub0000551518 update.pl[167503]: Generated file path: /var/drweb/updater/drweb/diff
Nov 13 03:29:20 sub0000551518 update.pl[167503]: Saving data into file '/var/drweb/updater/drweb/diff'...

........omit........
Nov 8 03:39:45 sub0000551518 update.pl[58416]: Generated file path: /var/drweb/updater/drweb/data/
Nov 8 03:39:45 sub0000551518 update.pl[58416]: Generated file path: /var/drweb/updater/drweb/diff
Nov 8 03:39:45 sub0000551518 update.pl[58416]: Saving data into file '/var/drweb/updater/drweb/diff'...
Nov 8 03:39:46 sub0000551518 update.pl[58416]: Socket path is /var/drweb/run/updateSock
Nov 8 03:39:46 sub0000551518 drwebd.real[10631]: SIGHUP received, reloading...
Nov 8 03:39:46 sub0000551518 drwebd.real[10631]: Dr.Web (R) daemon for Linux/Plesk Edition v6.0.2.9
Nov 8 03:39:46 sub0000551518 drwebd.real[10631]: Copyright (c) Igor Daniloff, 1992-2025
Nov 8 03:39:46 sub0000551518 drwebd.real[10631]: Doctor Web, Moscow, Russia
Nov 8 03:39:46 sub0000551518 drwebd.real[10631]: Support service: Dr.Web technical support
Nov 8 03:39:46 sub0000551518 drwebd.real[10631]: To purchase: Dr.Web Enterprise Security Suite
Nov 8 03:39:47 sub0000551518 drwebd.real[10631]: Key file: /opt/drweb/drweb32.key - Key file was not found! (No such file or directory)

***********************************END******************************

 

[Sebahat.hadzhi]

Thank you for your update and provided details. Dr.Web Updater can not send HUP signal to Dr.Web daemon usually means that the Dr. Web service is not active. So, I would assume that the service was not properly started along with the server, hence, resulting in the error. As per Key file: /opt/drweb/drweb32.key - Key file was not found! (No such file or directory) - it is likely due to corruption of the drweb package. What I can recommend is to try removing and re-installing Dr. Web according to the following article:

• Unable to start Plesk Premium Antivirus ( Dr.Web ) on Plesk server