What is Payload error in web activity in ADF while processing azure analysis tabular model

Question

I am using web activity in ADF pipeline to process a table in azure analysis service cube (Tabular model cube). It works fine most of the times but frequently getting below error and the pipeline fails after few minutes or hours when I check the status of the execution inside the loop. But the table processing is in progress at back end in AAS. Can anyone tell me the reason for this error and how to fix as the error is not occurring always.

The ADF pipeline is designed as same as given in this url: https://medium.com/ricoh-digital-services/process-azure-analysis-services-models-with-azure-data-factory-v2-d7c6288f352c

Answer 1

Hi @Poornima

Did you try setting the factoryTenantId parameter correctly in the GetAzureASRefreshStatus activity and checking for other issues that could be causing the "payload error" when using a web activity in Azure Data Factory to process an Azure Analysis Services tabular model?

To resolve the intermittent "payload error" issue when using a web activity in Azure Data Factory to process an Azure Analysis Services tabular model, you can try the following steps:

Check if the managed identity is still enabled and has the necessary permissions to access the Azure Analysis Services cube. You can do this by going to the Azure portal, selecting the AAS instance, and checking the "Access" tab to ensure that the managed identity has the necessary permissions.

If the managed identity is still enabled and has the necessary permissions, try restarting the pipeline and see if the issue persists. This will generate a new authentication token for the managed identity, which might resolve the issue.

To give the pipeline more time to complete the cube processing before checking the status again, consider increasing the timeout value for the until loop in your pipeline.

Another possible solution is to use a user-assigned managed identity instead of a system-assigned managed identity. This will give you more control over the managed identity and its permissions, and you can also renew the authentication token manually if needed.

Alternatively, you can try using a different authentication method, such as a service principal or a shared access signature token. Service principals are a common authentication method for AAS, and they provide more control over the permissions and access to the AAS instance. SAS tokens are another option, and they provide a secure way to grant temporary access to the AAS instance.

I hope this helps! Let me know if you have any further questions.