[Assp-test] assp 100% cpu but basicly idle

[<kr...@gm...>]

I have assp (ASSP version 2.4.1(14132)) running on multiple servers.
Those servers have exacly same configuration, os (mirrored), hardware.
On one of these servers assp is causing high cpu ussage. After
restarting assp cpu usage is rising constantly and "slowly". After
about 4 hours it it 100% on i7-4770. After about 8-16 hours assp is so
slow to respond that monitoring service sees it as not running and
restarts it. Server has low traffic volume, much lower that most of my
other servers. There is nothing in assp logs (even on highest
verbosity for connection logging) - a smtp session every 5-30 seconds
maybe. Assp "ASSP Worker/DB/Regex Status" shows workers in
"ThreadGetNewCon" status. Strace executed on assp pid shows a lot more
of FUTEX_WAKE_OP_PRIVATE in comparison than on assp on other servers.
There is no problems with other software on server and nothing on
dmesg so I don't think it is a hardware problem. I even tried
reinstalling fresh pel 5.18 with new modules by mod_inst.pl. Can
anyone help?

futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
sched_yield()                           = 0
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
sched_yield()                           = 0
sched_yield()                           = 0
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa20, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN
(Resource temporarily unavailable)
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 2
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa20, FUTEX_WAIT_PRIVATE, 2, NULL) = -1 EAGAIN
(Resource temporarily unavailable)
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
sched_yield()                           = 0
futex(0x7fb2da74fa5c, FUTEX_WAIT_PRIVATE, 88147493, NULL) = -1 EAGAIN
(Resource temporarily unavailable)
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7fb2da74fa58, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa5c, FUTEX_WAIT_PRIVATE, 88147495, NULL) = -1 EAGAIN
(Resource temporarily unavailable)
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa5c, FUTEX_WAKE_OP_PRIVATE, 1, 1, 0x7fb2da74fa58,
{FUTEX_OP_SET, 0, FUTEX_OP_CMP_GT, 1}) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa20, FUTEX_WAKE_PRIVATE, 1) = 0
futex(0x7fb2da74fa58, FUTEX_WAKE_PRIVATE, 1) = 1
futex(0x7fb2da74fa5c, FUTEX_WAIT_PRIVATE, 88147501, NULL) = -1 EAGAIN
(Resource temporarily unavailable)