Bug#540777: nscd: using 100% of cpu immediately after start

[Siim Põder <siim@p6drad-teel.net>]

Package: nscd
Version: 2.7-18
Severity: important


Immediately after starting nscd it starts using 100% cpu, strace showing:

[pid 15848] futex(0x552acc75e0, FUTEX_WAKE, 1 <unfinished ...>
[pid 15845] write(2, "15842: short read while reading r"..., 7415842:
short read while reading request: Resource temporarily
unavailable
 <unfinished ...>
[pid 15847] close(11 <unfinished ...>
[pid 15842] epoll_wait(10,  <unfinished ...>
[pid 15848] <... futex resumed> )       = 0
[pid 15845] <... write resumed> )       = 74
[pid 15847] <... close resumed> )       = 0
[pid 15842] <... epoll_wait resumed> {}, 100, 4292900169) = 0
[pid 15848] futex(0x552acc7540, FUTEX_WAKE, 1 <unfinished ...>
[pid 15845] close(11 <unfinished ...>
[pid 15847] futex(0x552acc75e4, FUTEX_WAIT, 18, NULL <unfinished ...>
[pid 15842] epoll_wait(10,  <unfinished ...>
[pid 15848] <... futex resumed> )       = 0
[pid 15845] <... close resumed> )       = -1 EBADF (Bad file descriptor)
[pid 15842] <... epoll_wait resumed> {{EPOLLRDNORM, {u32=9, u64=9}}},
100, 4292900169) = 1
[pid 15848] fcntl(11, F_GETFL <unfinished ...>
[pid 15845] clock_gettime(CLOCK_MONOTONIC,  <unfinished ...>
[pid 15842] accept(9,  <unfinished ...>
[pid 15848] <... fcntl resumed> )       = -1 EBADF (Bad file descriptor)
[pid 15845] <... clock_gettime resumed> {37414733, 947065224}) = 0
[pid 15842] <... accept resumed> 0, NULL) = 11
[pid 15848] close(11 <unfinished ...>
[pid 15845] futex(0x552acc75e4, FUTEX_WAIT, 19, {0, 168829000}
<unfinished ...>
[pid 15842] epoll_ctl(10, EPOLL_CTL_ADD, 11, {EPOLLRDNORM, {u32=11,
u64=11}} <unfinished ...>
[pid 15848] <... close resumed> )       = 0
[pid 15842] <... epoll_ctl resumed> )   = -1 EBADF (Bad file descriptor)
[pid 15848] futex(0x552acc75e4, FUTEX_WAIT, 20, NULL <unfinished ...>
[pid 15842] close(11)                   = -1 EBADF (Bad file descriptor)
[pid 15842] epoll_wait(10, {}, 100, 4292900169) = 0
[pid 15842] epoll_wait(10, {}, 100, 4292900169) = 0
[pid 15842] epoll_wait(10, {}, 100, 4292900169) = 0
[pid 15842] epoll_wait(10, {}, 100, 4292900169) = 0
[pid 15842] epoll_wait(10, {}, 100, 4292900169) = 0
....

epoll_wait ad nauseam

This may or may not be the same bug as #513635:
 * the system is also using ldap
 * there is just one nscd thread
 * number of fds used is low while there is 100% CPU usage
 * nscd seems to work find in spite of this


-- System Information:
Debian Release: 5.0.2
  APT prefers stable
  APT policy: (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 2.6.8-12-amd64-k8-smp (SMP w/2 CPU cores)
Locale: LANG=en_US, LC_CTYPE=en_US (charmap=ISO-8859-1)
Shell: /bin/sh linked to /bin/bash

Versions of packages nscd depends on:
ii  libc6                         2.7-18     GNU C Library: Shared libraries

nscd recommends no packages.

nscd suggests no packages.

-- no debconf information