在 function 末尾检查执行错误的代码？

Question

I've created a google app script that runs on a Google Sheets file. Every day at ~9am a trigger runs on of my functions.

Every few days (I don't know why) but I get an

Execution Error: Service invoked too many times for one day: urlfetch

I've given up trying to solve that issue, but it would be great if at the end of my function I could include some code to check if there was an execution error and if so run another function eg

myfunction_9am() {
    <try run some code>
    if (execution Status = "Failed") {      <<this is the bit I don't know how to code
        myfunction_error();
    }
}

Answer 1

Error handling in Apps Script can be handled by both JavaScript and Apps Script troubleshooting tools.

function myFunction() {
try{
  //Some code 
}catch(e) {
  //Code to run only if there is an error
  console.error("Error: " + e + "Stack: " + e.stack);//Send to StackDriver
  myErrorHandlingFunction(e);
} 
}

Error handling function:

function myErrorHandlingFunction(e) {
  var body,errMsg, recipient,stack;

  if (!e) {
    return;
  }

  errMsg = e.message;
  stack = e.stack;

  recipient = Session.getEffectiveUser().getEmail();
  subject = "Error in Code";

  body = 'The error is: ' + errMsg + "\n\nStack:" + stack;
  GmailApp.sendEmail(recipient, subject, body);
}

The letter e in the parenthesis is an "exception object" that contains a JavaScript error message, and the "stack." If the catch block runs code, then the execution failed. You don't need to test for whether it failed or not. To get the error message use e.message and to get the stack use e.stack .

You may wish to send error information to Apps Script StackDriver service and/or handle the error through your own code.