Long running Cloud Functions are self-executing

[justingosan]

Issue Description

Long running Cloud Functions are self-executing.

Steps to reproduce

Have a really long running Cloud Function

Parse.Cloud.define('longRunningFn', (req, res) => {
     console.log('executing...');
     setTimeout(res.success, 1000000);
});

and execute it once Parse.Cloud.run('longRunningFn');

Expected Results

Should only run once (1 log line)

executing...

Actual Outcome

After a while of running, it will execute again... and again.. and again..

executing...
executing...
executing...
executing...

Environment Setup

• Server

  • parse-server version (Be specific! Don't say 'latest'.) : 2.3.7
  • Operating System: macOS
  • Hardware: Macbook Pro 2017
  • Localhost or remote server? (AWS, Heroku, Azure, Digital Ocean, etc): Local

• Database

  • MongoDB version: 3.4.6
  • Storage engine: MongoDB
  • Hardware: Macbook Pro 2017
  • Localhost or remote server? (AWS, mLab, ObjectRocket, Digital Ocean, etc): Local

Logs/Trace

Include all relevant logs. You can turn on additional logging by configuring VERBOSE=1 in your environment.

[natanrolnik]

Who is calling this function? If it's from the SDKs, then probably it reached the timeout and retried for a few times. If that's the case, you should configure the number of retries to 0.

[natanrolnik]

Check this issue here: #3651
Also, if you have a function than runs for so long, you should rethink it.

[justingosan]

Thanks for the heads up. I'm using the Javascript SDK but I can't seem to find the option to set retries. http://docs.parseplatform.org/js/guide/#getting-started

Mind if you point me to the right direction? :)

[addisonElliott]

I don't think you can set the timeout in the Javascript SDK (as with most of the other Parse SDKs).

I haven't worked with Javascript in great detail, but let me show you some indication why I think this. The following file is where REST commands are sent. This occurs in the function ajax and ajaxIE9. ajax uses XHttpRequest and ajaxIE9 uses XDomainRequest.

https://github.com/parse-community/Parse-SDK-JS/blob/73ccdd3ce5031db81eaed1ffd8523c08efb74b5c/src/RESTController.js

In either case, there are timeout variables for each type that can be set but are not and there are no options to.

The one odd thing that I cannot figure out is that the timeout is supposed to be infinite if not set, which is not the case for you.

[flovilmart]

@justingosan you should not have long running functions otherwise you'll hit the timeout, you should return early if your cloud function is that long, otherwise consider starting a lightweight Task and let the user wait for the result through live queries for example.

[wyantb]

For anyone finding this issue from google, note that you may be able to configure the max retries via the sdk using APIs like discussed in https://community.parseplatform.org/t/how-can-i-set-request-attempt-limit-or-another-request-params-for-cloud-functions/929 Parse.CoreManager.set('REQUEST_ATTEMPT_LIMIT', 1);