Power BI Report Server January 2026 – msmdsrv restarts, SQLDmpr files

Hi JacksonWearne ,

We experienced the same issue after upgrading to the January 2026 Power BI Report Server release (msmdsrv restarts and continuous SQLDmpr dump generation).

We opened a support case with Microsoft, and they confirmed this is a known issue in this release. The product team is currently working on a fix.

Temporary Workaround (from Microsoft Support)

Until a fixed build is released, Microsoft advised deleting the generated mini dump files to prevent disk exhaustion:

Default path:
C:\Program Files\Microsoft Power BI Report Server\PBIRS\LogFiles

Delete files ending with:
.mdmp

This is only a temporary mitigation and does not resolve the root cause.

You can monitor the official PBIRS changelog for updates:
https://learn.microsoft.com/power-bi/report-server/changelog

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