[Bug 1068889] Please test proposed package

[Colin Watson]

Hello Mark, or anyone else affected,

Accepted eglibc into quantal-proposed. The package will build now and be
available at http://launchpad.net/ubuntu/+source/eglibc/2.15-0ubuntu20.1
in a few hours, and then in the -proposed repository.

Please help us by testing this new package.  See
https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to
enable and use -proposed.  Your feedback will aid us getting this update
out to other Ubuntu users.

If this package fixes the bug for you, please add a comment to this bug,
mentioning the version of the package you tested, and change the tag
from verification-needed to verification-done. If it does not fix the
bug for you, please add a comment stating that, and change the tag to
verification-failed.  In either case, details of your testing will help
us make a better decision.

Further information regarding the verification process can be found at
https://wiki.ubuntu.com/QATeam/PerformingSRUVerification .  Thank you in
advance!

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https://bugs.launchpad.net/bugs/1068889

Title:
  nscd should not cache netgroups by default

Status in “eglibc” package in Ubuntu:
  Fix Released
Status in “eglibc” source package in Precise:
  Fix Committed
Status in “eglibc” source package in Quantal:
  Fix Committed

Bug description:
  [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

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