Ubuntu
python-pysnmp4 package

python-pysnmp-common conflicts with python-pysnmp2

Bug #769205 reported by scm
26
This bug affects 2 people
Affects Status Importance Assigned to Milestone
python-pysnmp4 (Ubuntu)
Fix Released
Medium
Unassigned
Lucid
Fix Released
Medium
Unassigned
Ubuntu lucid-updates

Bug Description

In Lucid it is currently possible to install both python-snmp-common and python-pysnmp2 on the same system but since both provide the same file one ends up with broken packages.

This has been fixed in python-snmp4 version 4.1.9a-2 by adding a breaks and conflicts (http://bazaar.launchpad.net/~ubuntu-branches/ubuntu/natty/python-pysnmp4/natty/revision/8) with python-snmp2. This fix should be included in Lucid to prevent people from ending up in a situation where they have broken packages.

TEST CASE:

1) sudo apt-get install python-pysnmp-common
2) sudo apt-get install python-pysnmp2
3) observe dpkg returning an error code

1) sudo apt-get install python-snmp-common and python-pysnmp4 from lucid-proposed
2) sudo apt-get install python-pysnmp2
3) observe that python-pysnmp2 is not installable

-------

Binary package hint: python-pysnmp-common

This is about the versions currently available for Lucid (10.04)

There should be a conflicts relationship between python-pysnmp-common and python-pysnmp2 since both attempt to provide the same file. This results in a dpkg failure if trying to apt-get install either package after the other.

 scm@scm:/tmp/tmp.jemCOScqRP$ dpkg --contents python-pysnmp2_2.0.9-2_all.deb | grep __init__
-rw-r--r-- root/root 334 2002-05-20 08:12 ./usr/share/pyshared/pysnmp/__init__.py
scm@scm:/tmp/tmp.jemCOScqRP$ dpkg --contents python-pysnmp-common_4.1.9a-1ubuntu0.10.04.1_all.deb | grep __init__
-rw-r--r-- root/root 844 2006-12-13 12:23 ./usr/share/pyshared/pysnmp/__init__.py

What happened:

scm@scm:/tmp/tmp.jemCOScqRP$ sudo apt-get install python-pysnmp-common
[SNIP]
Setting up python-pysnmp-common (4.1.9a-1ubuntu0.10.04.1) ...
ldconfig deferred processing now taking place
Processing triggers for python-support ...
scm@scm:/tmp/tmp.jemCOScqRP$ dpkg -s python-pysnmp-common
Package: python-pysnmp-common
Status: install ok installed
Priority: optional
Section: python
Installed-Size: 72
Maintainer: Ubuntu MOTU Developers <email address hidden>
Architecture: all
Source: python-pysnmp4
Version: 4.1.9a-1ubuntu0.10.04.1

scm@scm:/tmp/tmp.jemCOScqRP$ sudo apt-get install python-pysnmp2
[SNIP]
Fetched 42.6kB in 0s (216kB/s)
Selecting previously deselected package python-pysnmp2.
(Reading database ... 239263 files and directories currently installed.)
Unpacking python-pysnmp2 (from .../python-pysnmp2_2.0.9-2_all.deb) ...
dpkg: error processing /var/cache/apt/archives/python-pysnmp2_2.0.9-2_all.deb (--unpack):
 trying to overwrite '/usr/share/pyshared/pysnmp/__init__.py', which is also in package python-pysnmp-common 0:4.1.9a-1ubuntu0.10.04.1
Errors were encountered while processing:
 /var/cache/apt/archives/python-pysnmp2_2.0.9-2_all.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
scm@scm:/tmp/tmp.jemCOScqRP$ dpkg -s python-pysnmp2
Package: python-pysnmp2
Status: install ok not-installed
Priority: optional
Section: python

Yikes, now I have a broken package.

What I expected:

Apt should have nicely warned me about this conflict.

See original description
Joseph Salisbury (jsalisbury)
Changed in python-pysnmp4 (Ubuntu):
status: New → Confirmed
Revision history for this message
Joseph Salisbury (jsalisbury) wrote :

I can confirm this issue:

jsalisbury@salisbury-lucid-multi-nic:~$ sudo apt-get install python-pysnmp-common
Setting up python-pysnmp-common (4.1.9a-1ubuntu0.10.04.1) ...
...

###########################

jsalisbury@salisbury-lucid-multi-nic:~$ sudo apt-get install python-pysnmp2
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following NEW packages will be installed:
  python-pysnmp2
0 upgraded, 1 newly installed, 0 to remove and 4 not upgraded.
Need to get 42.6kB of archives.
After this operation, 365kB of additional disk space will be used.
Get:1 http://us.archive.ubuntu.com/ubuntu/ lucid/universe python-pysnmp2 2.0.9-2 [42.6kB]
Fetched 42.6kB in 14s (2,893B/s)
Selecting previously deselected package python-pysnmp2.
(Reading database ... 42723 files and directories currently installed.)
Unpacking python-pysnmp2 (from .../python-pysnmp2_2.0.9-2_all.deb) ...
dpkg: error processing /var/cache/apt/archives/python-pysnmp2_2.0.9-2_all.deb (--unpack):
 trying to overwrite '/usr/share/pyshared/pysnmp/__init__.py', which is also in package python-pysnmp-common 0:4.1.9a-1ubuntu0.10.04.1
E: Sub-process /usr/bin/dpkg returned an error code (1)

###########################

jsalisbury@salisbury-lucid-multi-nic:~$ dpkg -s python-pysnmp2
Package: python-pysnmp2
Status: install ok not-installed
Priority: optional
Section: python

Brian Murray (brian-murray)
Changed in python-pysnmp4 (Ubuntu Lucid):
status: New → Triaged
importance: Undecided → Medium
Changed in python-pysnmp4 (Ubuntu):
status: Confirmed → Fix Released
importance: Undecided → Medium
Changed in python-pysnmp4 (Ubuntu Lucid):
milestone: none → lucid-updates
Brian Murray (brian-murray)
description: updated
Revision history for this message
Brian Murray (brian-murray) wrote :

I've uploaded a new version of python-pysnmp4 to lucid-proposed that adds a breaks and conflicts with python-pysnmp2.

Revision history for this message
Clint Byrum (clint-fewbar) wrote : Please test proposed package

Accepted python-pysnmp4 into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance!

Changed in python-pysnmp4 (Ubuntu Lucid):
status: Triaged → Fix Committed
tags: added: verification-needed
Revision history for this message
scm (scm) wrote :

Confirmed that this now fails as expected. If I install python-pysnmp-common first, I get an error when trying to install python-pysnmp2, and if I attempt to install both at the same time, I get an error about the conflict.

# apt-get install python-pysnmp2 python-pysnmp-common
[SNIP]
Some packages could not be installed. This may mean that you have
[SNIP]
The following packages have unmet dependencies:
  python-pysnmp-common: Breaks: python-pysnmp2 (< 2.0.9-3~) but 2.0.9-2 is to be installed
E: Broken packages

tags: added: verification-done
removed: verification-needed
Revision history for this message
Launchpad Janitor (janitor) wrote :

This bug was fixed in the package python-pysnmp4 - 4.1.9a-1ubuntu0.10.04.2

---------------
python-pysnmp4 (4.1.9a-1ubuntu0.10.04.2) lucid-proposed; urgency=low

  * Make python-pysnmp-common break and replace python-pysnmp2 (<< 2.0.9-3)
    (LP: #769205)
 -- Brian Murray <email address hidden> Mon, 16 May 2011 12:57:31 -0700

Changed in python-pysnmp4 (Ubuntu Lucid):
status: Fix Committed → Fix Released
Ubuntu Foundations Team Bug Bot (crichton)
tags: added: testcase
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