zabbix_server [1568]: ERROR [file:lld_item.c,line:866] Something impossible has just happened.
  1568:20190418:130642.324 === Backtrace: ===
  1568:20190418:130642.324 10: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](zbx_backtrace+0x2b) [0x50ad4b]
  1568:20190418:130642.324 9: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec]() [0x4ab9bb]
  1568:20190418:130642.324 8: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](lld_update_items+0xb30) [0x4b1500]
  1568:20190418:130642.324 7: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](lld_process_discovery_rule+0x617) [0x4a0417]
  1568:20190418:130642.324 6: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](lld_worker_thread+0x676) [0x49f536]
  1568:20190418:130642.324 5: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](zbx_thread_start+0x3e) [0x513d6e]
  1568:20190418:130642.324 4: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](MAIN_ZABBIX_ENTRY+0x5cc) [0x42951c]
  1568:20190418:130642.324 3: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](daemon_start+0x1a5) [0x50a865]
  1568:20190418:130642.324 2: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec](main+0x354) [0x428724]
  1568:20190418:130642.324 1: /lib64/libc.so.6(__libc_start_main+0xf5) [0x7f154c0ec495]
  1568:20190418:130642.324 0: /zabbix/zabbix/sbin/zabbix_server: lld worker #2 [processed 16 LLD rules, idle 5.158473 sec during 5.423573 sec]() [0x428a83]