ActiveXperts Knowledge Base Article 7560030
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This means that there are more SMTP Trap notification requests than the ActiveXperts Network Monitor Engine service can handle. There can be various reasons for that:
- The SMTP Trap agent is not functioning
- The network connection to the SMTP Trap agent is slow
- Too many notifications as a result of failed checks
SMTP Trap notification requests are queued in the following folder by default:
C:\ProgramData\ActiveXperts\Network Monitor\Ipc\Queue\Alerts\
Requests are processed in FIFO order.
There are two ways to clear all SMTP Trap notification requests:
- Delete all SMTP*.REQ files in the above folder
- OR disable SMTP Trap notifications (Tools->Notifications Settings: Disable SMTP Trap Notifications) and restart the ActiveXperts Network Monitor Engine service; it will clear all SMTP Trap notification requests
The maximum queue length is defined by the following registry value:
HKLM\Software\ActiveXperts\Network Monitor\Server\Queue\MaxPendingSmtpTrapRequests
You can change the value using the registry editor (REGEDIT.EXE). You need to restart the service for the changes to take effect.
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