Tonight at 00:00 UTC nxagentd was increased CPU utilisation till 100%, after next:

Jul  1 02:59:59 server.name kernel: Clock: inserting leap second 23:59:60 UTC

Performance counter stats for '/opt/netxms/bin/nxagentd -c /opt/netxms/etc/nxagentd.conf':

      16031.305848 task-clock                #    0.752 CPUs utilized
            38,838 context-switches          #    0.002 M/sec
                 0 CPU-migrations            #    0.000 M/sec
            38,258 page-faults               #    0.002 M/sec

strase show this:

munmap(0x7f61fb411000, 4096)            = 0
gettimeofday({1435738907, 198496}, NULL) = 0
futex(0xc16204, FUTEX_WAIT_BITSET_PRIVATE|FUTEX_CLOCK_REALTIME, 98945, {1435738908, 198496000}, ffffffff) = -1 ETIMEDOUT (Connection timed out)
futex(0xc16230, FUTEX_WAKE_PRIVATE, 1)  = 0
open("/proc/diskstats", O_RDONLY)       = 10
fstat(10, {st_mode=S_IFREG|0444, st_size=0, ...}) = 0
mmap(NULL, 4096, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f61fb411000
read(10, "   1       0 ram0 0 0 0 0 0 0 0 "..., 1024) = 1024
read(10, "99 451033876 3895485636 12358696"..., 1024) = 386
read(10, "", 1024)                      = 0
close(10)

Version of client was 1.2.17, tried upgrade to 2.0-m5, but problem is not gone.