zabbix_server [1794316]: ERROR [file and function: <cache.c,tfc_index_add>, revision:9aa30c495c, line:325] Something impossible has just happened.
1794316:20220316:093451.518 === Backtrace: ===
1794316:20220316:093451.519 23: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_backtrace+0x52) [0x55884ace14e2]
1794316:20220316:093451.519 22: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x31e47f) [0x55884adbb47f]
1794316:20220316:093451.519 21: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_tfc_put_value+0x110) [0x55884adbb9f9]
1794316:20220316:093451.519 20: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_trends_eval_avg+0xa4) [0x55884adba53b]
1794316:20220316:093451.519 19: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x2220e0) [0x55884acbf0e0]
1794316:20220316:093451.519 18: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](evaluate_function2+0x550) [0x55884acc0097]
1794316:20220316:093451.519 17: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x22672a) [0x55884acc372a]
1794316:20220316:093451.519 16: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x22758c) [0x55884acc458c]
1794316:20220316:093451.519 15: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x230a26) [0x55884accda26]
1794316:20220316:093451.519 14: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x2328f1) [0x55884accf8f1]
1794316:20220316:093451.519 13: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x232bd8) [0x55884accfbd8]
1794316:20220316:093451.519 12: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_eval_execute_ext+0x5a) [0x55884accff26]
1794316:20220316:093451.519 11: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_expression_eval_execute+0x1b4) [0x55884acc519c]
1794316:20220316:093451.519 10: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](get_value_calculated+0x1bf) [0x55884ab183fd]
1794316:20220316:093451.520 9: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x770fa) [0x55884ab140fa]
1794316:20220316:093451.520 8: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_check_items+0xc0) [0x55884ab16985]
1794316:20220316:093451.520 7: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](+0x7a555) [0x55884ab17555]
1794316:20220316:093451.520 6: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](poller_thread+0x219) [0x55884ab17fa1]
1794316:20220316:093451.520 5: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](zbx_thread_start+0x3b) [0x55884acf2a46]
1794316:20220316:093451.520 4: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](MAIN_ZABBIX_ENTRY+0x122e) [0x55884aaf4e3e]
1794316:20220316:093451.520 3: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](daemon_start+0x2f9) [0x55884ace1024]
1794316:20220316:093451.520 2: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](main+0x2a7) [0x55884aaf3af2]
1794316:20220316:093451.520 1: /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3) [0x7fe1d5e260b3]
1794316:20220316:093451.520 0: /usr/sbin/zabbix_server: history poller #4 [got 0 values in 0.004361 sec, getting values](_start+0x2e) [0x55884aaf296e]
1793845:20220316:093451.567 One child process died (PID:1794316,exitcode/signal:1). Exiting ...
zabbix_server [1793845]: Error waiting for process with PID 1794316: [10] No child processes
1793845:20220316:093452.317 syncing history data...
1793845:20220316:093452.391 syncing history data... 99.248120%
1793845:20220316:093452.391 syncing history data done
1793845:20220316:093452.391 syncing trend data...
1793845:20220316:093502.066 syncing trend data done
1793845:20220316:093502.318 Zabbix Server stopped. Zabbix 5.4.11 (revision 9aa30c495c).