[Bug 381063] Re: dbus needs more than the default 1024 open files

[Alkis Georgopoulos]

** Changed in: ltsp (Ubuntu)
       Status: New => Invalid

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Title:
  dbus needs more than the default 1024 open files

Status in “dbus” package in Ubuntu:
  Fix Released
Status in “ltsp” package in Ubuntu:
  Invalid

Bug description:
  === PROBLEM ===
  On a multiuser system with many desktop users, the system dbus-daemon process can easily exceed the 1024 open files allowed by the default ulimit. When it exceeds that, it goes into a tight loop, sucking up 100% processor, and nobody can log in.

  === WORKAROUND ===
  Add the line
  limit nofile 10000 10000
  to /etc/init/dbus.conf . Tested and works on Ubuntu 9.04 and 10.04.

  Note: Editing /etc/default/dbus does not work any longer since the
  transition to the upstart job.

  === ORIGINAL DESCRIPTION ===
  Ubuntu 9.04
  dbus 1.2.12-0ubuntu2
  We're on x86_64, but this is really arch independent

  On a multiuser system with many desktop users, the system dbus-daemon
  process can easily exceed the 1024 open files allowed by the default
  ulimit. When it exceeds that, it goes into a tight loop, sucking up
  100% processor, and nobody can log in. And, of course, everything
  using dbus is then adversely affected. Nothing in the logs points to
  too many open files as being the problem. Only attaching strace to the
  processes clarified what was happening. This is bad for thin client
  people. e.g. Edubuntu users and corporate desktop rollouts.

  As an example, I have a corporate server running 58 gnome desktops via
  XDMCP and dbus-daemon has about 1200 files open.

  Increasing the default "ulimit -n" setting for user 'messagebus' or
  including a higher "ulimit -n" in the sysvinit file solves the
  problem.

  Other than that, Ubuntu has done wonderfully compared to the Fedora
  that we just upgraded from. I'm most pleased with your excellent work.

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