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How to Debug Azure Function Timeouts When Using Durable Functions with HttpTrigger?

πŸ‘€ Views: 66 πŸ’¬ Answers: 1 πŸ“… Created: 2025-06-09
azure durable-functions cloud csharp

Quick question that's been bugging me - I'm working with a frustrating scenario with my Azure Durable Functions. The function is set up as an HTTP Trigger and orchestrates a series of activities, but I'm running into timeout issues that I need to seem to resolve. I've configured the function timeout in the host.json like this: ```json { "functionTimeout": "00:10:00" } ``` However, I still receive a 'Function execution timed out' behavior after 5 minutes when trying to execute a long-running process. The orchestration function is designed to wait for several activities to complete before returning a response. Here’s a simplified version of the orchestration function: ```csharp [FunctionName("OrchestratorFunction")] public static async Task<string> RunOrchestrator( [OrchestrationTrigger] IDurableOrchestrationContext context) { var result1 = await context.CallActivityAsync<string>("ActivityFunction1", null); var result2 = await context.CallActivityAsync<string>("ActivityFunction2", null); return result1 + result2; } ``` I’ve also tried increasing the timeout at the function level, but I still get the same result. I've checked the Azure Function's settings and verified that the Application Plan is set to Premium, which should theoretically allow for longer execution times. Also, I noticed that when I run the activities separately, they complete successfully without issues. Here's how I call one of the activities: ```csharp [FunctionName("ActivityFunction1")] public static string RunActivity([ActivityTrigger] string name) { // Simulated long-running task Thread.Sleep(600000); // Simulates a 10 minute task return "Result from Activity 1"; } ``` I’m concerned that the timeout scenario might be due to the way the orchestration is managed or perhaps some underlying configuration I’m missing. I've consulted the Azure documentation, but it doesn't seem to address timeout issues in this capacity. Any advice on how to effectively debug and resolve these timeout issues would be greatly appreciated! My development environment is Ubuntu. I'd really appreciate any guidance on this. Thanks for your help in advance!