NO_RESPONSE_FROM_FUNCTION

The NO_RESPONSE_FROM_FUNCTION error occurs when a function invocation completes without returning a response. This might happen if the function encounters an error that prevents it from responding, or if it fails to generate a response within the allowed execution time.

Potential causes include:

• A global uncaught exception
• A global unhandled rejection
• A deployment that introduced incorrect syntax

To troubleshoot this error, follow these steps:

1. Verify return statements: Ensure that the function has the necessary return statements to generate a response
2. Check the function logs: Open the realtime request logs for the application in a separate tab - this tab must be kept open while reproducing the error
3. Review realtime logs: Repeat the application behavior that led to the error being thrown and review the realtime request logs where it will now show
   • Use the information contained within the error logs to understand where the function is failing
4. Use log drains: If you're yet to implement a Log Drain, you can create one to persist errors from Serverless Functions
5. Check external dependencies: If the function relies on external services or APIs, ensure they are responding in a timely manner