Hi,

my host program hangs from time to time when looking up ip addresses and there
is some problem in communication with the dns servers.
The timeout doesn't work.

# strace host -W 2 104.18.132.189
[...]
open("/proc/self/task/18527/comm", O_RDWR) = 6
write(6, "isc-socket", 10)              = 10
close(6)                                = 0
open("/usr/share/locale/POSIX/libdst.cat", O_RDONLY) = -1 ENOENT (No such file
or directory)
open("/usr/share/locale/POSIX/LC_MESSAGES/libdst.cat", O_RDONLY) = -1 ENOENT
(No such file or directory)
open("/usr/share/locale/POSIX/libdst.cat", O_RDONLY) = -1 ENOENT (No such file
or directory)
open("/usr/share/locale/POSIX/LC_MESSAGES/libdst.cat", O_RDONLY) = -1 ENOENT
(No such file or directory)
futex(0x7fddcde1a628, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0x7fddcde1a62c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0x7fddcc628078, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0x7fddcc62602c, FUTEX_WAKE_PRIVATE, 2147483647) = 0
futex(0x7fddcc628070, FUTEX_WAKE_PRIVATE, 2147483647) = 0
openat(AT_FDCWD, "/etc/ssl/openssl.cnf", O_RDONLY) = 6
fstat(6, {st_mode=S_IFREG|0644, st_size=10771, ...}) = 0
read(6, "#\n# OpenSSL example configuratio"..., 4096) = 4096
read(6, "ape crash on BMPStrings or UTF8S"..., 4096) = 4096
read(6, " is omitted\n# the certificate ca"..., 4096) = 2579
read(6, "", 4096)                       = 0
close(6)                                = 0
openat(AT_FDCWD, "/etc/resolv.conf", O_RDONLY) = 6
fstat(6, {st_mode=S_IFREG|0644, st_size=882, ...}) = 0
read(6, "### /etc/resolv.conf file autoge"..., 4096) = 882
read(6, "", 4096)                       = 0
close(6)                                = 0
getpid()                                = 18524
getppid()                               = 18522
gettimeofday({tv_sec=1571393298, tv_usec=682937}, NULL) = 0
gettimeofday({tv_sec=1571393298, tv_usec=683193}, NULL) = 0
gettimeofday({tv_sec=1571393298, tv_usec=683451}, NULL) = 0
gettimeofday({tv_sec=1571393298, tv_usec=683722}, NULL) = 0
futex(0x7fddcdfee0c8, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fddcdfee028, FUTEX_WAKE_PRIVATE, 1) = 1
rt_sigaction(SIGHUP, {sa_handler=0x7fddcd16d530, sa_mask=~[RTMIN RT_1],
sa_flags=SA_RESTORER, sa_restorer=0x7fddccf1b360}, NULL, 8) = 0
rt_sigsuspend([], 8^C)                    = ? ERESTARTNOHAND (To be restarted
if no handler)
strace: Process 18524 detached


# rpm -qf /usr/bin/host
bind-utils-9.11.2-lp150.8.16.1.x86_64