#19382 closed Bug (fixed)

Closing SMTP backend raises AttributeError when already closed

Reported by: sebastian_noack Owned by: nobody
Component: Core (Mail) Version: 1.4
Severity: Normal Keywords:
Cc: Triage Stage: Accepted
Has patch: yes Needs documentation: no
Needs tests: yes Patch needs improvement: no
Easy pickings: yes UI/UX: no


>>> from django.core.mail import get_connection
>>> smtp = get_connection('django.core.mail.backends.smtp.EmailBackend')
>>> smtp.close()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/home/sebastian/p24/src/placement24/placement24/django/core/mail/backends/", line 66, in close
AttributeError: 'NoneType' object has no attribute 'quit'

The SMTP backend is the only mail backend that can't be closed without opening it. In fact the filebased backend contains code to explicitly handle that case. So the smtp backend should handle it as well.

If that is not reason enough, note that it is not always possible to know whether the connection is open and must be closed or not. For example, when open() was called and an SMTP connection was established, but the login failed, close() must be called even though open() raised an exception. However when the exception was raised while establishing the connection, close() would raise the AttributeError, shown above.

Therefore the close() method must just return in case the connection isn't open.

Attachments (1)

0001-Don-t-fail-when-closing-closed-smtp-backend.patch (779 bytes) - added by sebastian_noack 17 months ago.

Download all attachments as: .zip

Change History (5)

Changed 17 months ago by sebastian_noack

comment:1 Changed 17 months ago by atykhonov

  • Easy pickings set
  • Needs documentation unset
  • Needs tests unset
  • Patch needs improvement unset
  • Triage Stage changed from Unreviewed to Ready for checkin

comment:2 Changed 17 months ago by claudep

  • Needs tests set
  • Triage Stage changed from Ready for checkin to Accepted
  • Type changed from Uncategorized to Bug

Tests are needed.

comment:3 Changed 17 months ago by claudep

This is very close to #19134. There, I've given a clue about how to test it. Might be even worth fixing both tickets together.

comment:4 Changed 16 months ago by Claude Paroz <claude@…>

  • Resolution set to fixed
  • Status changed from new to closed

In 5b8c0d22cc07ca727c032edf3309fab9cb39f21d:

[1.5.x] Fixed #19382 -- Stopped smtp backend raising exception when already closed

Thanks Sebastian Noack for the report and the initial patch.
Backport of ffa50ca35 from master.

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