We have the same problem too:
r...@slxats2:~# ps -u messagebus
PID TTY TIME CMD
2677 ? 02:28:11 dbus-daemon
r...@slxats2:~# ls /proc/2677/fd|wc -l
1024
r...@slxats2:~#
r...@slxats2:~# (strace -p 2677 2>&1 1>&3 | grep "Too many open files"
1>&2) 3>&1
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
Here is a detailed excerpt from ptrace:
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
gettimeofday({1252007529, 345943}, NULL) = 0
poll([{fd=3, events=POLLIN}, {fd=6, events=POLLIN}, {fd=10, events=POLLIN},
{fd=9, events=POLLIN}, {fd=11, events=POLLIN}, {fd=12, events=POLLIN}, {fd=13,
events=POLLIN}, {fd=30, events=POLLIN}, {fd=32, events=POLLIN}, {fd=29,
events=POLLIN}, {fd=329, events=POLLIN}, {fd=343, events=POLLIN}, {fd=345,
events=POLLIN}, {fd=346, events=POLLIN}, {fd=358, events=POLLIN}, {fd=38,
events=POLLIN}, {fd=17, events=POLLIN}, {fd=21, events=POLLIN}, {fd=23,
events=POLLIN}, {fd=24, events=POLLIN}, {fd=27, events=POLLIN}, {fd=211,
events=POLLIN}, {fd=217, events=POLLIN}, {fd=221, events=POLLIN}, {fd=222,
events=POLLIN}, {fd=271, events=POLLIN}, {fd=321, events=POLLIN}, {fd=325,
events=POLLIN}, {fd=327, events=POLLIN}, {fd=328, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=339, events=POLLIN}, ...], 1018, 254392) = 1 ([{fd=3,
revents=POLLIN}])
gettimeofday({1252007529, 349210}, NULL) = 0
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
gettimeofday({1252007529, 349515}, NULL) = 0
poll([{fd=3, events=POLLIN}, {fd=6, events=POLLIN}, {fd=10, events=POLLIN},
{fd=9, events=POLLIN}, {fd=11, events=POLLIN}, {fd=12, events=POLLIN}, {fd=13,
events=POLLIN}, {fd=30, events=POLLIN}, {fd=32, events=POLLIN}, {fd=29,
events=POLLIN}, {fd=329, events=POLLIN}, {fd=343, events=POLLIN}, {fd=345,
events=POLLIN}, {fd=346, events=POLLIN}, {fd=358, events=POLLIN}, {fd=38,
events=POLLIN}, {fd=17, events=POLLIN}, {fd=21, events=POLLIN}, {fd=23,
events=POLLIN}, {fd=24, events=POLLIN}, {fd=27, events=POLLIN}, {fd=211,
events=POLLIN}, {fd=217, events=POLLIN}, {fd=221, events=POLLIN}, {fd=222,
events=POLLIN}, {fd=271, events=POLLIN}, {fd=321, events=POLLIN}, {fd=325,
events=POLLIN}, {fd=327, events=POLLIN}, {fd=328, events=POLLIN}, {fd=36,
events=POLLIN}, {fd=339, events=POLLIN}, ...], 1018, 254388) = 1 ([{fd=3,
revents=POLLIN}])
gettimeofday({1252007529, 464829}, NULL) = 0
accept(3, 0xbf8ec168, [16]) = -1 EMFILE (Too many open files)
gettimeofday({1252007529, 471040}, NULL) = 0
--
dbus needs more than the default 1024 open files
https://bugs.launchpad.net/bugs/381063
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