| 2012-10-19 22:44:48 |
Mark Russell |
bug |
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added bug |
| 2012-10-19 22:47:18 |
Mark Russell |
tags |
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precise |
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| 2012-10-19 23:22:26 |
Adam Conrad |
nominated for series |
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Ubuntu Precise |
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| 2012-10-19 23:22:26 |
Adam Conrad |
bug task added |
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eglibc (Ubuntu Precise) |
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| 2012-10-19 23:22:36 |
Adam Conrad |
eglibc (Ubuntu): assignee |
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Adam Conrad (adconrad) |
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| 2012-10-19 23:22:38 |
Adam Conrad |
eglibc (Ubuntu Precise): assignee |
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Adam Conrad (adconrad) |
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| 2012-10-25 17:52:02 |
Brian Murray |
eglibc (Ubuntu Precise): importance |
Undecided |
Medium |
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| 2012-10-25 17:52:05 |
Brian Murray |
eglibc (Ubuntu): importance |
Undecided |
Medium |
|
| 2012-11-26 11:03:40 |
Adam Conrad |
eglibc (Ubuntu): status |
New |
Fix Committed |
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| 2012-11-26 17:55:15 |
Launchpad Janitor |
eglibc (Ubuntu): status |
Fix Committed |
Fix Released |
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| 2013-01-28 03:32:32 |
Adam Conrad |
nominated for series |
|
Ubuntu Quantal |
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| 2013-01-28 03:32:32 |
Adam Conrad |
bug task added |
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eglibc (Ubuntu Quantal) |
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| 2013-01-28 03:42:58 |
Adam Conrad |
description |
Netgroup caching is a rather new feature of nscd. It only entered the eglibc source tree late last year and the first upstream release of nscd to include netgroup caching was on March 21, 2012 [1]. Thus, it's is a feature that is not likely deployed at any significant scale anywhere currently. And so it has poor general test coverage.
We have reports that this feature either segfaults nscd [1] or that even when it doesn't crash, the feature still doesn't work [2].
The "enabled" setting is inherited from upstream, but I think at least for precise, we should default to disabled.
[1] LP: #997096
[2] LP: #997752 |
[Impact / Justification]
The new netgroup caching feature seems to be plagued with issues, including random segfaults, and just plain not returning useful results, depending on your test bed. This patch doesn't address any of the actual issues, but just disabled netgroup caching in the default /etc/nscd.conf to discourage its use.
[Test Case]
Check after upgrade or fresh install that /etc/nscd.conf has netgroup caching disabled. This being a dpkg conffile, it won't be changed if you've modified it locally.
[Regression Potential]
Disabling a broken feature doesn't likely have much regression potential. We got here after spending a great deal of time trying to debug all the breakages with someone who was trying to use it, so I'm unconvinced anyone's using it successfully.
[Original Report]
Netgroup caching is a rather new feature of nscd. It only entered the eglibc source tree late last year and the first upstream release of nscd to include netgroup caching was on March 21, 2012 [1]. Thus, it's is a feature that is not likely deployed at any significant scale anywhere currently. And so it has poor general test coverage.
We have reports that this feature either segfaults nscd [1] or that even when it doesn't crash, the feature still doesn't work [2].
The "enabled" setting is inherited from upstream, but I think at least for precise, we should default to disabled.
[1] LP: #997096
[2] LP: #997752 |
|
| 2013-01-28 08:38:36 |
Adam Conrad |
eglibc (Ubuntu Quantal): assignee |
|
Adam Conrad (adconrad) |
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| 2013-01-28 10:58:41 |
Colin Watson |
eglibc (Ubuntu Precise): status |
New |
Fix Committed |
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| 2013-01-28 10:58:43 |
Colin Watson |
bug |
|
|
added subscriber Ubuntu Stable Release Updates Team |
| 2013-01-28 10:58:47 |
Colin Watson |
bug |
|
|
added subscriber SRU Verification |
| 2013-01-28 10:58:54 |
Colin Watson |
tags |
precise |
precise verification-needed |
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| 2013-01-28 11:00:04 |
Colin Watson |
eglibc (Ubuntu Quantal): status |
New |
Fix Committed |
|
| 2013-04-23 11:59:34 |
Adam Conrad |
tags |
precise verification-needed |
precise verification-done |
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| 2013-04-23 15:36:03 |
Colin Watson |
removed subscriber Ubuntu Stable Release Updates Team |
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| 2013-04-23 15:36:16 |
Launchpad Janitor |
eglibc (Ubuntu Precise): status |
Fix Committed |
Fix Released |
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| 2013-04-23 15:36:31 |
Launchpad Janitor |
eglibc (Ubuntu Quantal): status |
Fix Committed |
Fix Released |
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| 2013-06-25 06:19:11 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/eglibc |
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| 2013-08-28 10:02:58 |
Launchpad Janitor |
branch linked |
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lp:~ubuntu-branches/ubuntu/precise/eglibc/precise-proposed |
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| 2013-08-28 10:03:50 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/precise-updates/eglibc |
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| 2013-08-28 10:05:12 |
Launchpad Janitor |
branch linked |
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lp:~ubuntu-branches/ubuntu/quantal/eglibc/quantal-proposed |
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| 2013-08-28 10:06:44 |
Launchpad Janitor |
branch linked |
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lp:ubuntu/raring/eglibc |
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