zabbix 6.0.7 lld worker backtrace Something impossible has just happened

[zenkovac]

hi guys, i'm seeing this errors periodically every 1 minute in zabbix_server.log, this happens after an upgrade from 4.2.3 to 6.0.7.
Can someonw give me a hand trying to understand where this is coming from.
i've already tried turning on debugging of the lld worker logs but dont really see anything else.

zabbix_server [1312266]: ERROR [file and function: <lld_item.c,lld_items_get>, revision:442920c8f69, line:726] Something impossible has just happened.
1312266:20221202:125752.328 === Backtrace: ===
1312266:20221202:125752.329 12: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](zbx_backtrace+0x3f) [0x55a0d7ff5976]
1312266:20221202:125752.329 11: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](+0x182a81) [0x55a0d7f2ca81]
1312266:20221202:125752.329 10: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](lld_update_items+0xea) [0x55a0d7f384ef]
1312266:20221202:125752.329 9: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](lld_process_discovery_rule+0x4a3) [0x55a0d7f189da]
1312266:20221202:125752.329 8: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](+0x16b72e) [0x55a0d7f1572e]
1312266:20221202:125752.329 7: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](lld_worker_thread+0x30c) [0x55a0d7f15da4]
1312266:20221202:125752.329 6: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](zbx_thread_start+0x37) [0x55a0d8005a69]
1312266:20221202:125752.329 5: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](+0x66e91) [0x55a0d7e10e91]
1312266:20221202:125752.329 4: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](MAIN_ZABBIX_ENTRY+0x7b8) [0x55a0d7e11aaa]
1312266:20221202:125752.329 3: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](daemon_start+0x384) [0x55a0d7ff5595]
1312266:20221202:125752.329 2: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](main+0x33a) [0x55a0d7e101be]
1312266:20221202:125752.329 1: /lib64/libc.so.6(__libc_start_main+0xf3) [0x7fed39984493]
1312266:20221202:125752.329 0: /usr/sbin/zabbix_server: lld worker Special [processed 6 LLD rules, idle 5.226509 sec during 5.384919 sec](_start+0x2e) [0x55a0d7e0ef0e]


regards

[Markku]

When encountering that kind of "impossible" errors you should consider upgrading to the latest patch release.

Markku

[zenkovac]

ok, thanks markku for the advice