Something similar happens on Hardy Heron. Just found NSCD spinning on
100% CPU doing this:
[pid 5411] accept(9, 0, NULL) = -1 EMFILE (Too many open files)
[pid 5411] epoll_wait(10, {{EPOLLRDNORM, {u32=9, u64=9}}}, 100, 29988) = 1
[pid 5411] time(NULL) = 1234268027
[pid 5411] accept(9, 0, NULL) = -1 EMFILE (Too many open files)
[pid 5411] epoll_wait(10, {{EPOLLRDNORM, {u32=9, u64=9}}}, 100, 29988) = 1
[pid 5411] time(NULL) = 1234268027
Clearly if it gets an error from accept() it should at least log an
error and wait a bit, not just spin in a tight loop.
The problem is that it has opened too many unix sockets:
nscd 5411 root 1018u unix 0xd97dee00 3767356 /var/run/nscd/socket
nscd 5411 root 1019u unix 0xd976d600 3767367 /var/run/nscd/socket
nscd 5411 root 1020u unix 0xf4187e00 3767369 /var/run/nscd/socket
nscd 5411 root 1021u unix 0xd97de200 3767375 /var/run/nscd/socket
nscd 5411 root 1022u unix 0xf70dc000 3767438 /var/run/nscd/socket
nscd 5411 root 1023u unix 0xd9508e00 3767440 /var/run/nscd/socket
There are 33 threads running at the moment according to /proc/5411/task,
so there must be a file descriptor leak somewhere in nscd.
ch...@fen-ndiyo3(~)$ lsb_release -rd
Description: Ubuntu 8.04.2
Release: 8.04
ii nscd 2.7-10ubuntu4 GNU C Library: Name Service Cache Daemon
ii libnss-ldap 258-1ubuntu3 NSS module for using LDAP as a naming servic
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nscd stopped responding after LDAP server crash
https://bugs.launchpad.net/bugs/322800
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