Azure Functions: How to Properly Handle Timeout Exceptions in Durable Functions with HTTP Triggers?
Quick question that's been bugging me - I'm currently implementing an Azure Durable Function that is triggered via HTTP, and I'm running into issues with handling timeout exceptions... My function orchestrator has multiple activity functions, and sometimes the activities take longer than expected. For instance, I'm using the default timeout settings, which is around 5 minutes. If an activity exceeds this time, I receive the following behavior: ``` Function 'OrchestratorFunction' failed: Timeout exceeded. ``` I want to ensure that when a timeout occurs, I can gracefully handle it, perhaps by retrying the activity or logging the behavior for further investigation. I have tried wrapping my activity calls in a try-catch block, but it seems that the timeout exception isn't being caught as expected. Here’s a simplified version of my orchestrator function: ```csharp [FunctionName("OrchestratorFunction")] public static async Task RunOrchestrator([OrchestrationTrigger] IDurableOrchestrationContext context) { try { var result = await context.CallActivityAsync<string>("ActivityFunction", null); } catch (TimeoutException ex) { // Handle timeout here context.SetOutput("Timeout occurred"); } } ``` I've also experimented with increasing the timeout settings in the host.json file like this: ```json { "durableTask": { "maxConcurrentActivityFunctions": 5, "maxActivityFunctionTimeout": "00:10:00" } } ``` However, this doesn't seem to help with catching the exception. Any insights on how to handle timeouts effectively in this scenario would be greatly appreciated. Specifically, what is the best practice for logging timeout errors and deciding whether to retry the activity? Is there an Azure Functions setting that might help improve my overall timeout management? I'm developing on CentOS with Csharp. Thanks, I really appreciate it!