Skip to content
New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

[ci skip] explain async queue and rake tasks #29020

Merged
merged 3 commits into from
May 18, 2017

Conversation

stevenchanin
Copy link
Contributor

[ci skip]
Small update to the guide for ActiveJob to point out a problem that might commonly occur in development when using the Async Queue with rake tasks. Includes advice on how to solve it.

@rails-bot
Copy link

Thanks for the pull request, and welcome! The Rails team is excited to review your changes, and you should hear from @kaspth (or someone else) soon.

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

This repository is being automatically checked for code quality issues using Code Climate. You can see results for this analysis in the PR status below. Newly introduced issues should be fixed before a Pull Request is considered ready to review.

Please see the contribution instructions for more information.

@@ -310,6 +310,12 @@ UserMailer.welcome(@user).deliver_now
UserMailer.welcome(@user).deliver_later
```

NOTE: Using the asynchronous queue from a rake task (for example, to
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

Can you capitalize all instances of Rake?

send an email using `.deliver_later`) will generally not work because rake will
likely end, causing the in-process thread pool to be deleted, before any/all
of the `.deliver_later` emails are processed. To avoid this problem, use
`.deliver_now` or run a persistent queue in development as well.
Copy link
Contributor

Choose a reason for hiding this comment

The reason will be displayed to describe this comment to others. Learn more.

✂️ as well ✂️

@matthewd
Copy link
Member

matthewd commented May 9, 2017

Can we/should we just fix this instead?

@stevenchanin
Copy link
Contributor Author

@maclover7 - done

@stevenchanin
Copy link
Contributor Author

@maclover7 -- do my changes look ok to you?

@matthewd -- I'm not sure how to go about fixing this. I think (?) it would involve modifying rake to not exit if there are still async threads running? If that's right, it sounds like a big change that would require a lot of discussion. In any case, since this is just a documentation modification, I think it would make sense to merge it. It can always be removed if an actual fix is agreed on & implemented. Thoughts?

@maclover7
Copy link
Contributor

Going to merge as is -- better to get the docs fix in now :)

@maclover7 maclover7 merged commit 3f90e9e into rails:master May 18, 2017
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
Projects
None yet
Development

Successfully merging this pull request may close these issues.

None yet

5 participants