Aggregation timeout in Cosmos/MongoDb

Question

I am running an aggregation in CosmosDB/MongoDB shell compatibily 4 in serverless mode with the C# mongodb driver version 2.14.1.

With small datasets the aggregates run to completion but with larger datasets I get a timeout after 60. I have tried setting a timeout in code but it has no effect. Is there anyway to increase this limit?

Answer 1

Hi @Paul Conway Thank you for posting your question on Microsoft Q&A and for using Azure services

From my understanding you are trying to run an aggregation in CosmosDB/MongoDB shell compatibily 4 in serverless mode with the C# mongodb driver version 2.14.1 and getting a timeout after 60.
The 60 sec timeout is a Cosmos-wide functionality that cannot be changed unfortunately. In a scalable system, long-running operations are an anti-pattern - splitting them up is the solution. Here's some documentation explaining that and some options to make things work: Troubleshoot common errors in Azure Cosmos DB's API for Mongo DB | Microsoft Learn

Hope that helps

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Regards,
Oury