Public bug reported:
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.
** Affects: acpid (Ubuntu)
Importance: Undecided
Status: New
--
Leaks file descriptors and eventually runs out
https://bugs.launchpad.net/bugs/270259
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