[Bug 270259] Re: Leaks file descriptors and eventually runs out

[Bug Watch Updater]

** Changed in: acpid (Suse)
   Importance: Unknown => Critical

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https://bugs.launchpad.net/bugs/270259

Title:
  Leaks file descriptors and eventually runs out

Status in “acpid” package in Ubuntu:
  Fix Released
Status in “acpid” source package in Hardy:
  Fix Released
Status in “acpid” package in ALT Linux:
  Unknown
Status in “acpid” package in Suse:
  Fix Released

Bug description:
  Binary package hint: acpid

  I was performing a stress test which simulated part of system startup
  (including starting and stopping (SIGTERM) the X server) in a tight
  loop.  After 1000 or so iterations, the X server blocked during
  startup in connect(), trying to connect to /var/run/acpid.socket.

  The acpid log file was 2147483647 bytes and looked like this:

  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  [Sun Sep 14 19:43:54 2008] ERR: can't accept client: Too many open files
  <repeated millions of times>
  [Sun Sep 14 19:43:54 2008] E

  netstat and /proc/pid/fd showed that it had reached the ulimit for
  open file descriptors.  At that point, it must have started spewing to
  the log, and filled it up, at which point it didn't seem to even
  attempt accept(2) anymore.

  I could reproduce the fd leak using this simple python program:

  Python 2.5.2 (r252:60911, Apr 21 2008, 11:08:23) 
  [GCC 4.2.3 (Ubuntu 4.2.3-2ubuntu7)] on linux2
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import socket
  >>> help(socket)

  >>> s = socket.socket(socket.AF_UNIX, socket.SOCK_STREAM)
  >>> s.connect('/var/run/acpid.socket')
  >>> s.close()

  Each time I run this test, acpid gains another fd which never goes
  away.

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