NetXMS Support Forum

Did you open User Manager recently? From the same netxms console, or from another machine?
If you open Tools-> Server console, what is the output of
show sessions
command there?

Does this error stays, if you close netxms management console and start it again?

Most probably it will go away if you restart netxms server process.

What's the output of
show status where variable_name = "innodb_page_size";

I've just tried to install NetXMS 3.5 from packages on Debian 10 and upgrade to 3.6 went successfully. Could it be that your NetXMS database was created some time ago and on older MariaDB?

What is the value of innodb_page_size on your system?

Несколько путей:

а) в правиле в EPP в filtering script:
return ( (strftime("%H", time()) >= 8) and (strftime("%H", time()) < 19) );

Таким образом все правило в EPP не будет срабатывать ночью. Алармы также не будут создаваться. Если нужны алармы, то тогда нужно два правила в EPP.

б) не запускать action, отсылающий сообщение напрямую, а запускать action, вызывающий NXSL скрипт. В этом скрипте сделать проверку по времени и оттуда запускать отсылку сообщения:
if ( (strftime("%H", time()) >= 8) and (strftime("%H", time()) < 19) )
{
    SendNotification("Telegram", "Alice; Bob", "", "My message text");
}

Можно сделать Script DCI для сбора данных. Это может быть один скрипт, в который в качестве параметра передается OID.

В этом скрипте можно делать несколько попыток опроса с задежкой. Если все равно не получилось получить данные, можно сделать abort - в этом случае будет data collection erorr, но DCI не перейдет в unsupported.

Configuration poll is once per hour by default. You can try setting debug level 6 on one agent, restarting it and running configuration poll, in this case we will see at what moment this error is happening.
On what OS the agent is running?

Recent changes in NetXMS added fields to nodes table. Looks like we are now hitting page size limitation: https://mariadb.com/kb/en/innodb-row-formats-overview/#maximum-row-size
Increasing innodb_page_size might help.

А уведомления вне этого временного диапазона должны выбрасываться или дожидаться утра?

Was it one-time occurence or it happens often? Currently the probocol between management console and server is not tolerant to interruptions and console needs to be restarted.
Is there anything is netxms server log at that moment? Did server restart that moment?

Какая версия NetXMS?

apt install netxms-base

if it's already installed, try removing it first with
apt purge netxms-base

Did you manage to find and delete libnx* and libnetxms* files?

Please show the output of these two commands:
ldd /usr/bin/nxagentd
ldd /usr/lib/x86_64-linux-gnu/libnxdb.so.36

The database will stand as it is, so there is no need to do init or upgrade. Netxms will just connect to the database that it has in config file.

I would do the following way:
apt remove "netxms*"

Then find and delete the following files on the file system:
libnx*
libnetxms*

And then install netxms again - install  netxms-release package and then netxms-server, netxms-agent and database driver package.

try deleting /var/log/netxmsd and running
netxmsd -D 6
again.
Wil the error be the same?