Handling errors

If a handler reports a runtime or loading error, the runtime environment automatically captures the error and returns a JSON document with details of the error type, text, and location in the response. For more information about the JSON document format, see Calling a function.

The error data is also written to the execution log. You can view it using the YC CLI or management console.

Example of error handling

Function code:

module.exports.handler = function () {
    return unknownVariable;
};

JSON document returned:

{
  "errorMessage": "unknownVariable is not defined",
  "errorType": "ReferenceError",
  "stackTrace": [
    ...
  ]
}