Dynamic Mapping System Configuration (ArcGIS Enterprise 11.4)

[moremeowbell]

Hello all!

In our new deployment of ArcGIS Enterprise 11.4 we are having quite a few issues. One of the errors that we have seen in Server Manager logs pretty consistantly is a time out error for the System/DynamicMappingHost.MapServer. Has anyone had this error before? I have not seen it before and have not yet found any documentation on the error yet. Also, I am not certain what this system service does, so any insight would be appreciated!

Brief system background:

• ArcGIS Enterprise 11.4 
• Windows OS
• AWS infrastructure

Server Manager log error

[RyanUthoff]

DynamicMappingHost is referring to services published using the shared instance type. This documentation provides some more information about it.

Now regarding your error message, it appears that one of your services is struggling. If it's a heavily used service, it might be better off as a dedicated instance. If not, then there might be some performance issues with it that you will need to resolve. If you're not sure right off which service is causing issues, what you might be able to do is look at the raw log file (the text log file on your server machine) and find that error message. Then, take the RequestID of that error and do a search for it in the entire log file and you might be able to find that original request (along with the actual service name).

[moremeowbell]

Thank you for the documentation! We are getting error messages about various services, so I don't believe it is just one service that is bogging the system down.

[David_McRitchie]

Hey Jennifer,

Do things work fine if we do a manual restart of the DynamicMappingHost service after your Enterprise box has fully started?

I have seen a few issues from Enterprise 11.3-11.4 on deployments that have custom registered folders or databases involving the shared instance pool. You might be seeing this.

Many thanks,

David

[moremeowbell]

Hey David,

We have stopped and started the service through Server Manager but that has not resolved the issue. Is there another way to do a manual restart?

Thanks,

Jennifer

[David_McRitchie]

That should do it. It sounds like our issue here is not what I had in mind.

If we adjust the instance pool to either have more instances, or move this to a different instance pool type (i.e dedicated to shared) do we see any difference in the issue?

Hopefully we can get to the bottom of this soon.

David

[AdamMesser1]

@David_McRitchie can you provide any additional details about the "issues from Enterprise 11.3-11.4 on deployments that have custom registered folders or databases involving the shared instance pool"? 

[David_McRitchie]

Hey Adam,

The behaviour got logged under BUG-000173043 ( ArcGIS Server's DynamicMappingHost service will fail to start after rebooting Windows Server, where requests made to services running in Shared instance pool result in 500 wait timeout errors until the DynamicMappingHost service is restarted.)

I've seen this impact a few deployments. Only on 11.4 and in cases where a database, or folder had been registered on the Server Manager.

In instances that this is observed the deployment will either need to be upgraded to 11.5 to resolve, or an automated task to restart the DynamicMappingHost service after a machine reboot to be implemented.

Configuring Portal to start before Datastore and ArcGIS Server is also listed as a workaround.

Please let me know if this behaviour is impacting you or if you have any questions or concerns on this.

David