Hello,
I am experiencing weird system hangs. Once about 2-5 weeks system freezes=
=20
and stops accepting remote connections, so it is no longer possible to=20
connect to most important services: smtp (postfix), www (squid) or even=20
ssh. Such connection is accepted but then it hangs.
What is strange, that previously established ssh session is usable. It is=
=20
possible to work on such system until you do something stupid like "less=20
/var/log/all.log". Using strace I found that process blocks on:
--- strace: being ---
execve("/usr/bin/tail", ["tail", "-f", "/var/log/all.log"], [/* 33 vars */]=
) =3D 0
brk(0) =3D 0x8052000
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
=3D 0x6ff00000
access("/etc/ld.so.preload", R_OK) =3D -1 ENOENT (No such file or dire=
ctory)
open("/etc/ld.so.cache", O_RDONLY) =3D 3
fstat64(3, {st_mode=3DS_IFREG|0644, st_size=3D20944, ...}) =3D 0
mmap2(NULL, 20944, PROT_READ, MAP_PRIVATE, 3, 0) =3D 0x6fefa000
close(3) =3D 0
open("/lib/libc.so.6", O_RDONLY) =3D 3
read(3, "\177ELF\1\1\1\0\0\0\0\0\0\0\0\0\3\0\3\0\1\0\0\0RY\1\0004\0\0\0"...=
, 512) =3D 512
fstat64(3, {st_mode=3DS_IFREG|0755, st_size=3D1175920, ...}) =3D 0
mmap2(NULL, 1185212, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) =
=3D 0x6fdd8000
mmap2(0x6fef4000, 12288, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DE=
NYWRITE, 3, 0x11b) =3D 0x6fef4000
mmap2(0x6fef7000, 9660, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANO=
NYMOUS, -1, 0) =3D 0x6fef7000
close(3) =3D 0
mmap2(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) =
=3D 0x6fdd7000
set_thread_area({entry_number:-1 -> 6, base_addr:0x6fdd76b0, limit:1048575,=
seg_32bit:1, contents:0, read_exec_only:0, limit_in_pages:1, seg_not_prese=
nt:0, useable:1}) =3D 0
mprotect(0x6fef4000, 4096, PROT_READ) =3D 0
mprotect(0x6ff1c000, 4096, PROT_READ) =3D 0
munmap(0x6fefa...
