Need Latest CosmosDB Emulator

Joerb's Avatar


26 Sep, 2019 10:59 PM

We have upgraded our application to use the recently released v3 of the .net Cosmos SDK. Local builds requited us to update our CosmosDB Emulator to at least v2.5.6.0. Those local builds are now successful.

However our Appveyour builds are now failing due to:

Microsoft.Azure.Documents.DocumentClientException: Invalid API version. Ensure a valid x-ms-version header value is passed. 
266Please update to the latest version of Azure Cosmos DB SDK., Microsoft.Azure.Documents.Common/

I suspect this is because the version of the emulator installed at Appveyor is too old to interoperate with the new version of the .net SDK.

How do I confirm this and what is the way forward.

  1. Support Staff 1 Posted by Feodor Fitsner on 27 Sep, 2019 12:57 AM

    Feodor Fitsner's Avatar

    We'll update CosmosDB Emulator during the next images update. Please watch this issue:

    What build image is that, btw?

    For installing the latest CosmosDB Emulator during the build (take a min or so) add this to appveyor.yml:

    - ps: Start-FileDownload "" -FileName "$env:temp\cosmosdb-emulator.msi"
    - ps: cmd /c start /wait msiexec /i "$env:temp\cosmosdb-emulator.msi" /qn /quiet /norestart /log install.log
  2. 2 Posted by Joerg on 27 Sep, 2019 01:52 AM

    Joerg's Avatar

    What build image is that, btw?

    # Build Worker Image
    image: Previous Visual Studio 2017

    That what you need?

  3. Support Staff 3 Posted by Feodor Fitsner on 27 Sep, 2019 02:50 AM

    Feodor Fitsner's Avatar

    Is there a reason you use Previous image?

  4. 4 Posted by Joerg on 27 Sep, 2019 05:58 PM

    Joerg's Avatar

    In investigate why we are using Previous image. In the mean time installing the most recent as you suggest works. Though I had to uninstall the existing version with:

    - wmic product where name="Azure Cosmos DB Emulator" call uninstall

    You can close this case.

  5. Support Staff 5 Posted by Feodor Fitsner on 27 Sep, 2019 06:02 PM

    Feodor Fitsner's Avatar

    OK, thanks for the update!

  6. Feodor Fitsner closed this discussion on 03 Apr, 2020 06:45 PM.

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