Does anyone else have sporadic issues where WMI checks stop working for some machines? | Product Discussions

Kel L · 2026-03-31T16:15:06.104089Z

Hi,We will randomly have WMI completely stop working for some machines. It's rare, but when it happens, it basically means LM isn't able to get any data from those servers because 95% of Windows information is gathered through WMI.When the WMI queries stop working, it's not actually WMi that breaks on the hosts, it's port 135 that LM uses to connect to the host in order to run the WMI queries. If I run the query directly on the host computer it works fine. It's just when the collector tries to reach out and connect through port 135 that it can't and then fails to run the WMI query. This is not a collector problem because I also can't connect to these machines from our other Utility servers.When this happens, we can sometimes run some scripts to reset things, but it doesn't always work. I currently have 4 machines that are showing No Data for basically everything except Ping, because most of the rest of the things use WMI over port 135.What I did notice is that CIM queries work fine. If I manually run get-wmiobject to get CPU or Memory info, it will fail. If I run get-CIMInstance, it will work just fine.Get-WmiObject Win32_OperatingSystem -ComputerName $server -> Fail - The RPC server is unavailableGet-CimInstance Win32_OperatingSystem -ComputerName $server -> SuccessTo be clear, this isn't tehnically a problem with LM. But, since LM is using an RPC connection to run the WMI query, if RPC stops working, so does LM.Does anyone else run into this? If so, does anyone have a fix other than Rebooting the host server? I started duplicating some of the WMI-based module and turning them into CIM module using Powershell, but then I realized there are tons of them so I stopped. ;)Information I've seen online says that the old WMI query method has been replaced by CIM queries since it works better, is more secure, etc. Does LM have any plans to migrated to what is apparently the newer standard?

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Does anyone else have sporadic issues where WMI checks stop working for some machines? | Product Discussions | LogicMonitor Community