Error4 reports
Fix FunctionInvocationException
in Azure Functions
✅ Solution
FunctionInvocationException in Azure Functions commonly arises from unhandled exceptions within your function code or incompatibilities between the host and function dependencies. Ensure robust error handling with try-catch blocks in your function, and verify that your function app's dependencies are compatible with the Azure Functions runtime version you're using. Review the function execution logs in Azure Monitor for detailed stack traces to pinpoint the root cause and address it directly within your function code or deployment configuration.
Related Issues
Real GitHub issues where developers encountered this error:
Worker process exiting with code 0 leaves worker channel danglingDec 3, 2025
System.MissingMethodException was being thrown by ServiceBusTrigger on some running instances. (It recovered naturally within about a week)Oct 10, 2025
Returning an unmaterialized IEnumerable sometimes causes silent failuresFeb 21, 2025
FunctionsLogs has incorrect values in HostVersion column for exception scenariosJan 29, 2025
Timeline
First reported:Jan 29, 2025
Last reported:Dec 3, 2025
Need More Help?
View the full changelog and migration guides for Azure Functions
View Azure Functions Changelog