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Following on from this Forum post https://community.fabric.microsoft.com/t5/Service/ServerError-DM-GWPipeline-Gateway-MonitoredDbConne... (Please see that post for relevant logfile snippets)
After upgrading the gateway to the latest version, roughly 1/3 of all Direct Query queries are reporting error ServerError_DM_GWPipeline_Gateway_MonitoredDbConnectionError in BI Service. From what I've been able to determine, it happens to all reports that use Direct Query, regardless of the direct query data source.
The only connection we can find is that all the errors are using Direct Query. Import Refreshes don't seem to experience this issue.
Additionally, this error message isn't documented anywhere that I've been able to find.
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