Applications Systems

WQL Query return value is empty or doesn't exist

This document outlines an issue where a WMI Monitor in SAM sometimes goes unknown. It can go unknown with WQL Query return value is empty or doesn't exist. This will cause Application Unknown Events and Alerts.

First published date

10/10/2018 6:58 PM

Last published date

10/10/2018 6:58 PM

Overview

A WMI Monitor Component  periodically goes into an Unknown State with the following error:

WQL Query return value is empty or doesn't exist

Product section

Server Application Monitor

Cause

The WMI Monitor will go into an Unknown State if the query sometimes returns no information.

Resolution

Manually run the query via wbemtest when the issue is occurring:

  1. Run > 
    wbemtest
  2. Connect using the following credentials:
    Namespace: \\xxx.xxx.xxx.xxx\root\cimv2
    User: DOMAIN\Username
    Password: **********
  3. Query.
  4. Run the same query that SAM is running.

If you get no data returning periodically then this is why the error displays within the SAM Component Monitor.