SP2019 Server - MinRole - DistCache Complaining about memory usage on wrong server

Question

My newly deployed SP2019 environment set up in MinRole topology (x2 App w/ Search and x2 Web w/ DistCache) is complaining about high / not enough memory for DistCache service on the wrong server.

DistCache should be on the x2 Web servers. The service is reporting as correctly installed on these machines and not on the App w/ search servers however Central Admin health analyzer keeps reporting issues:

Title The Current server is running low on memory.
Severity 2 - Warning
Category Availability
Explanation
The memory usage on the current server is about {0}. This can cause the eviction or throttling of the Distributed Cache Service/

Remedy
Check the memory usage on the machine.And try to free up some memory or add more ram on the machine. For more information about this rule, see "https://go.microsoft.com/fwlink/?LinkID=224261".

Failing Servers
SPAPP01

Failing Services
SPDistributedCacheService (AppFabricCachingService)

This server does not have DistCache installed or enabled so I am unsure how I resolve. Ideas and advice welcomed, thank you.

Answer 1

Please go to services on server to ensure that the DistributedCacheService is stopped in the application server.

Generally please refer to the following articles to solve this issue:

https://docs.microsoft.com/en-us/sharepoint/technical-reference/the-current-server-is-running-low-on-memory

Answer 2

It looks like a bug with the Health analyzer itself, when Dist cache has previously been provisioned on APP server too, right after installation.

I was able to solve this only by running again Dist cache on my APP server and leave it as it is, only then the error has gone.

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Probably, changing localhost to server's DNS-name in C:\Program Files\AppFabric 1.1 for Windows Server\DistributedCacheService.exe.config may help (as described here: http://fangdahai.blogspot.com/2014/12/appfabric-caching-service-stopped.html). Maybe Health Analyzer job trying to read this config from every server on the farm, looks for Dist cache service on localhost as specified in this file, cannot find a running service, thus generating this error.

But this config is different from one that is generated by the Export-CacheClusterConfig so I'm not sure that DistributedCacheService.exe.config is applicable to SharePoint. Anyway it's worth trying.