I'm with a very very wierd bug...
I have a flask app using flask-mail to send email messages.
In a RedHat Server, I tryied using runserver (flask-manager) and gunicorn. So I have a apache server connecting to this app using Proxy.
When I run the app, using any user (root or other), the app runs and it sends emails normally.
But when i close the session with the server (exit in terminal) it stops to send mail and gives me this stack trace:
in send_mail
return mail.send(msg)
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 415, in send
with self.connect() as connection:
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 123, in __enter__
self.host = self.configure_host()
File "/usr/local/lib/python2.7/site-packages/flask_mail.py", line 144, in configure_host
host.login(self.mail.username, self.mail.password)
File "/usr/local/lib/python2.7/smtplib.py", line 575, in login
self.ehlo_or_helo_if_needed()
File "/usr/local/lib/python2.7/smtplib.py", line 535, in ehlo_or_helo_if_needed
if not (200 <= self.ehlo()[0] <= 299):
File "/usr/local/lib/python2.7/smtplib.py", line 406, in ehlo
self.putcmd(self.ehlo_msg, name or self.local_hostname)
File "/usr/local/lib/python2.7/smtplib.py", line 336, in putcmd
self.send(str)
File "/usr/local/lib/python2.7/smtplib.py", line 320, in send
print>>stderr, 'send:', repr(str)
IOError: [Errno 5] Input/output error
Running with manager:
Running with gunicorn I use:
I'm really stuck here.. as i tested using 2 different containers... i do not have any other ideias to solve it... using wsgi i could not make it work on this server cause the lib do not install at all =(
any other ideas?
thanks!
Looking at smtplib source (https://hg.python.org/cpython/file/2.7/Lib/smtplib.py#l324), it looks like what's happening is you're trying to write to stderr, which may be the source of the I/O error when running under a server.
If you're setting SMTP(...).debuglevel anywhere, try removing that line.