34705:20190517:170120.768 2: /app/zabbix/sbin/zabbix_server: poller #20 [got 7 values in 0.047905 sec, getting values](main+0x44b) [0x418ffb]
 34705:20190517:170120.768 1: /lib64/libc.so.6(__libc_start_main+0xfd) [0x3e6941ed1d]
 34705:20190517:170120.768 0: /app/zabbix/sbin/zabbix_server: poller #20 [got 7 values in 0.047905 sec, getting values]() [0x417bc9]
 34690:20190517:170129.001 Zabbix agent item "system.swap.size[,free]" on host "Zabbix server" failed: first network error, wait for 15 seconds
 34640:20190517:170134.825 Got signal [signal:15(SIGTERM),sender_pid:44842,sender_uid:0,reason:0]. Exiting ...
 34640:20190517:170134.958 syncing history data...
 34640:20190517:170134.958 syncing history data done
 34640:20190517:170134.958 syncing trend data...
 34640:20190517:170137.503 syncing trend data done
 34640:20190517:170137.519 Zabbix Server stopped. Zabbix 4.0.5 (revision 90164).

5946:20190517:170918.254 Starting Zabbix Server. Zabbix 4.2.1 (revision 92832).
 5946:20190517:170918.255 ****** Enabled features ******
 5946:20190517:170918.255 SNMP monitoring: YES
 5946:20190517:170918.255 IPMI monitoring: NO
 5946:20190517:170918.255 Web monitoring: YES
 5946:20190517:170918.255 VMware monitoring: YES
 5946:20190517:170918.255 SMTP authentication: NO
 5946:20190517:170918.255 Jabber notifications: NO
 5946:20190517:170918.255 Ez Texting notifications: YES
 5946:20190517:170918.255 ODBC: NO
 5946:20190517:170918.255 SSH2 support: NO
 5946:20190517:170918.255 IPv6 support: NO
 5946:20190517:170918.255 TLS support: NO
 5946:20190517:170918.255 ******************************
 5946:20190517:170918.255 using configuration file: /app/zabbix/etc/zabbix_server.conf
 5946:20190517:170918.262 current database version (mandatory/optional): 04000000/04000003
 5946:20190517:170918.262 required mandatory version: 04020000
 5946:20190517:170918.262 starting automatic database upgrade
 5946:20190517:170918.449 completed 3% of database upgrade
 5946:20190517:170918.450 completed 7% of database upgrade
 5946:20190517:170918.747 completed 10% of database upgrade
 5946:20190517:170918.948 completed 14% of database upgrade
 5946:20190517:170918.976 completed 17% of database upgrade
 5946:20190517:170918.980 completed 21% of database upgrade
 5946:20190517:170919.009 completed 25% of database upgrade
 5946:20190517:170919.086 completed 28% of database upgrade
 5946:20190517:170919.091 completed 32% of database upgrade
 5946:20190517:170919.096 completed 35% of database upgrade
 5946:20190517:170919.107 completed 39% of database upgrade
 5946:20190517:170919.884 completed 42% of database upgrade
 5946:20190517:170919.894 completed 46% of database upgrade
 5946:20190517:170919.895 completed 50% of database upgrade
 5946:20190517:170919.896 completed 53% of database upgrade
 5946:20190517:170919.897 completed 57% of database upgrade
 5946:20190517:170919.966 completed 60% of database upgrade
 5946:20190517:170919.998 completed 64% of database upgrade
 5946:20190517:170919.999 [Z3005] query failed: [1091] Can't DROP 'c_dchecks_1'; check that column/key exists [alter table dchecks drop foreign key c_dchecks_1]
 5946:20190517:170919.999 database upgrade failed