[Bug 1505670] Re: "uncaptured python exception"

[Lucas Kanashiro]

@Rolf and others, thanks for all the testing done so far. Since the
importance is set to Low I do not believe we will have time to tackle
this anytime soon, but I'd be happy to sponsor a fixed package if anyone
wants to work on it. In order to land this fix we would need to follow
the SRU process:

https://wiki.ubuntu.com/StableReleaseUpdates

Once we have the SRU bug description in place and a debdiff, we can
review the and sponsor your work.

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https://bugs.launchpad.net/bugs/1505670

Title:
  "uncaptured python exception"

Status in python2.7 package in Ubuntu:
  New
Status in squid-deb-proxy package in Ubuntu:
  Confirmed
Status in python2.7 source package in Bionic:
  New
Status in squid-deb-proxy source package in Bionic:
  New
Status in python2.7 source package in Focal:
  New
Status in squid-deb-proxy source package in Focal:
  New

Bug description:
  I get the following error when running the discovery script on the
  command line.

  $ /usr/share/squid-deb-proxy-client/apt-avahi-discover
  error: uncaptured python exception, closing channel <AptAvahiClient> ('10.1.2.3', 3142): 2147483647 (<class 'socket.error'>:[Errno 111] Connection refused [/usr/lib/python2.7/asyncore.py|read|83] [/usr/lib/python2.7/asyncore.py|handle_read_event|446] [/usr/lib/python2.7/asyncore.py|handle_connect_event|454])
  error: uncaptured python exception, closing channel <AptAvahiClient> ('10.0.3.1', 3142): 2147483647 (<class 'socket.error'>:[Errno 111] Connection refused [/usr/lib/python2.7/asyncore.py|read|83] [/usr/lib/python2.7/asyncore.py|handle_read_event|446] [/usr/lib/python2.7/asyncore.py|handle_connect_event|454])
  error: uncaptured python exception, closing channel <AptAvahiClient> ('172.24.74.129', 3142): 2147483647 (<class 'socket.error'>:[Errno 111] Connection refused [/usr/lib/python2.7/asyncore.py|read|83] [/usr/lib/python2.7/asyncore.py|handle_read_event|446] [/usr/lib/python2.7/asyncore.py|handle_connect_event|454])
  http://172.24.74.145:3142/

  The last line still returns the proper proxy URI so as far as I can
  tell things are still working.  The IP 10.1.2.3 is for an n2n VPN.
  This is on trusty with version 0.8.6ubuntu1.

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