[Bug 1505670] Re: "uncaptured python exception"

[Christian Ehrhardt ]

** Description changed:

  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.
+ 
+ To trigger the bug the environment setup needs to be in a specific way.
+ It seems for the problem to occur it need more than one host/IP discovered via avahi. This can be probed via $ avahi-browse -kprtf _apt_proxy._tcp
+ and e.g. the common LXD setup of IPv4 + ipv6 is NOT enough to trigger it.
+ 
+ TODO: a sample output of the above command in an affected environment
+ could be helpful.
+ 
+ TODO: if possible outlining how the environment can be configured to
+ have this multi host/IP reply in avahi would be helpful as well.

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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.

  To trigger the bug the environment setup needs to be in a specific way.
  It seems for the problem to occur it need more than one host/IP discovered via avahi. This can be probed via $ avahi-browse -kprtf _apt_proxy._tcp
  and e.g. the common LXD setup of IPv4 + ipv6 is NOT enough to trigger it.

  TODO: a sample output of the above command in an affected environment
  could be helpful.

  TODO: if possible outlining how the environment can be configured to
  have this multi host/IP reply in avahi would be helpful as well.

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