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[Bug 1332440] Re: apt-get update very slow when ulimit -n is big

To: touch-packages@xxxxxxxxxxxxxxxxxxx
From: Toby Corkindale <1332440@xxxxxxxxxxxxxxxxxx>
Date: Wed, 03 Feb 2016 03:27:49 -0000
Reply-to: Bug 1332440 <1332440@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx
Apologies, I retract that -- looks like the issue was related to MTU and
PMTU discovery.. It just happened that the machines with the mtu issues
were also the ones with huge ulimits configured.

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https://bugs.launchpad.net/bugs/1332440

Title:
  apt-get update very slow when ulimit -n is big

Status in apt package in Ubuntu:
  Confirmed

Bug description:
  I use strace to see why apt-get update is too slow,
  finally I found apt-get loop 3~n to '(? , F_SETFD, FD_CLOEXEC) = 0'

  ubuntu 14.04

  root@dev2:/tmp/apt-1.0.1ubuntu2.1# apt-cache show apt
  Package: apt
  Priority: important
  Section: admin
  Installed-Size: 3576
  Maintainer: Ubuntu Developers <ubuntu-devel-discuss@xxxxxxxxxxxxxxxx>
  Original-Maintainer: APT Development Team <deity@xxxxxxxxxxxxxxxx>
  Architecture: amd64
  Version: 1.0.1ubuntu2.1
  Replaces: manpages-it (<< 2.80-4~), manpages-pl (<< 20060617-3~), openjdk-6-jdk (<< 6b24-1.11-0ubuntu1~), sun-java5-jdk (>> 0), sun-java6-jdk (>> 0)
  Depends: libapt-pkg4.12 (>= 0.9.16), libc6 (>= 2.15), libgcc1 (>= 1:4.1.1), libstdc++6 (>= 4.6), ubuntu-keyring, gnupg
  Suggests: aptitude | synaptic | wajig, dpkg-dev (>= 1.17.2), apt-doc, python-apt
  Conflicts: python-apt (<< 0.7.93.2~)
  Breaks: manpages-it (<< 2.80-4~), manpages-pl (<< 20060617-3~), openjdk-6-jdk (<< 6b24-1.11-0ubuntu1~), sun-java5-jdk (>> 0), sun-java6-jdk (>> 0)
  Filename: pool/main/a/apt/apt_1.0.1ubuntu2.1_amd64.deb
  Size: 952374

  
  [pid 20525] stat("/var/lib/apt/lists/mirrors.163.com_ubuntu_dists_trusty-updates_universe_i18n_Translation-en%5fUS", 0x7fffaabe5b30) = -1 ENOENT (No such file or directory)
  [pid 20525] stat("/usr/lib/apt/methods/bzip2", {st_mode=S_IFREG|0755, st_size=23056, ...}) = 0
  [pid 20525] pipe([9, 11])               = 0
  [pid 20525] pipe([13, 14])              = 0
  [pid 20525] fcntl(9, F_SETFD, FD_CLOEXEC) = 0
  [pid 20525] fcntl(11, F_SETFD, FD_CLOEXEC) = 0
  [pid 20525] fcntl(13, F_SETFD, FD_CLOEXEC) = 0
  [pid 20525] fcntl(14, F_SETFD, FD_CLOEXEC) = 0
  [pid 20525] clone(child_stack=0, flags=CLONE_CHILD_CLEARTID|CLONE_CHILD_SETTID|SIGCHLD, child_tidptr=0x7f99f1ea9a50) = 20538
  Process 20538 attached
  [pid 20525] fcntl(9, F_GETFL)           = 0 (flags O_RDONLY)
  [pid 20525] fcntl(9, F_SETFL, O_RDONLY|O_NONBLOCK) = 0
  [pid 20538] rt_sigaction(SIGPIPE, {SIG_DFL, [PIPE], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0},  <unfinished ...>
  [pid 20525] fcntl(14, F_GETFL <unfinished ...>
  [pid 20538] <... rt_sigaction resumed> {SIG_IGN, [PIPE], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0}, 8) = 0
  [pid 20525] <... fcntl resumed> )       = 0x1 (flags O_WRONLY)
  [pid 20538] rt_sigaction(SIGQUIT, {SIG_DFL, [QUIT], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0},  <unfinished ...>
  [pid 20525] fcntl(14, F_SETFL, O_WRONLY|O_NONBLOCK <unfinished ...>
  [pid 20538] <... rt_sigaction resumed> {SIG_DFL, [], 0}, 8) = 0
  [pid 20525] <... fcntl resumed> )       = 0
  [pid 20538] rt_sigaction(SIGINT, {SIG_DFL, [INT], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0},  <unfinished ...>
  [pid 20525] close(11 <unfinished ...>
  [pid 20538] <... rt_sigaction resumed> {SIG_DFL, [], 0}, 8) = 0
  [pid 20525] <... close resumed> )       = 0
  [pid 20538] rt_sigaction(SIGWINCH, {SIG_DFL, [WINCH], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0},  <unfinished ...>
  [pid 20525] close(13 <unfinished ...>
  [pid 20538] <... rt_sigaction resumed> {0x409140, [WINCH], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0}, 8) = 0
  [pid 20525] <... close resumed> )       = 0
  [pid 20538] rt_sigaction(SIGCONT, {SIG_DFL, [CONT], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0},  <unfinished ...>
  [pid 20525] select(10, [9], NULL, NULL, NULL <unfinished ...>
  [pid 20538] <... rt_sigaction resumed> {SIG_DFL, [], 0}, 8) = 0
  [pid 20538] rt_sigaction(SIGTSTP, {SIG_DFL, [TSTP], SA_RESTORER|SA_RESTART, 0x7f99f0e72ff0}, {SIG_DFL, [], 0}, 8) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(3, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(4, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(5, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(6, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(7, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(8, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(9, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(10, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(11, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(12, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(13, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(14, F_SETFD, FD_CLOEXEC) = 0
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(15, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(16, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(17, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(18, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(19, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(20, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(21, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(22, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(23, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(24, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(25, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(26, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(27, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(28, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(29, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(30, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(31, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(32, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(33, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(34, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(35, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(36, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(37, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(38, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(39, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(40, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(41, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(42, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(43, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(44, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(45, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(46, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(47, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(48, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(49, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(50, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(51, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(52, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(53, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(54, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(55, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(56, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(57, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(58, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(59, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(60, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(61, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(62, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(63, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(64, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(65, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(66, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(67, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(68, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(69, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(70, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(71, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(72, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(73, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(74, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(75, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(76, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(77, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(78, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(79, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(80, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(81, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(82, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(83, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(84, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(85, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(86, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(87, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(88, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(89, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(90, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(91, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(92, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(93, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(94, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(95, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(96, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(97, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(98, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] fcntl(99, F_SETFD, FD_CLOEXEC) = -1 EBADF (Bad file descriptor)
  [pid 20538] getrlimit(RLIMIT_NOFILE, {rlim_cur=100, rlim_max=100}) = 0
  [pid 20538] dup2(11, 1)                 = 1
  [pid 20538] dup2(13, 0)                 = 0
  [pid 20538] fcntl(1, F_SETFD, 0)        = 0
  [pid 20538] fcntl(0, F_SETFD, 0)        = 0

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: apt 1.0.1ubuntu2
  ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9
  Uname: Linux 3.13.0-24-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3
  Architecture: amd64
  Date: Fri Jun 20 15:36:00 2014
  InstallationDate: Installed on 2011-10-08 (985 days ago)
  InstallationMedia: Ubuntu-Server 11.04 "Natty Narwhal" - Release amd64 (20110426)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: apt
  UpgradeStatus: Upgraded to trusty on 2014-04-29 (51 days ago)

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