Public bug reported:
5-15% of packages downloaded through apt-cacher-ng are corrupt with a
"Size mismatch" or "Hash Sum mismatch" error, reported by the client.
Apparently, the corrupted files on the cache host in /var/cache/apt-
cacher-ng are not corrupt but contain a different package than the
filename suggests. For example, python-apt_0.8.3ubuntu7.1_amd64.deb is
in fact xz-lzma_5.1.1alpha+20110809-3
Not sure how to debug this further.
I use apt-cacher-ng on various hosts on various isolated environments.
Some apt-cacher-ng installs yield a higher "size mismatch" frequency
than others, which might indicate a race condition. The ones with lower
error frequency have higher uplink speeds and higher cpu speeds.
ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: apt-cacher-ng 0.7.18-1
ProcVersionSignature: Ubuntu 3.11.0-9.16-generic 3.11.2
Uname: Linux 3.11.0-9-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu1
Architecture: amd64
Date: Thu Oct 3 22:44:42 2013
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-09-03 (30 days ago)
InstallationMedia: Xubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130723.2)
MarkForUpload: True
SourcePackage: apt-cacher-ng
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.apt.cacher.ng.backends.ubuntu: [modified]
modified.conffile..etc.apt.cacher.ng.security.conf: [inaccessible: [Errno 13]
Permission denied: '/etc/apt-cacher-ng/security.conf']
mtime.conffile..etc.apt.cacher.ng.backends.ubuntu: 2013-09-03T16:38:18.300177
** Affects: apt-cacher-ng (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug saucy
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https://bugs.launchpad.net/bugs/1234946
Title:
"Size mismatch" caused by writing wrong data
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