getting this error every 4 to 5 hours interval and dns server stops
● named.service - Berkeley Internet Name Domain (DNS)
Loaded: loaded (/usr/lib/systemd/system/named.service; enabled; vendor preset: disabled)
Active: failed (Result: signal) since Tue 2021-06-08 05:56:27 UTC; 2h 1min ago
Main PID: 906 (code=killed, signal=KILL)
Jun 08 01:19:57 wadp.paxon.tech named[906]: client @0x7fda100a9060 88.80.186.137#62351 (amazon.com): query (cache) 'amazon.com/A/IN' denied
Jun 08 01:19:57 wadp.paxon.tech named[906]: client @0x7fda100a9060 88.80.186.137#62351 (77.236.7.3.in-addr.arpa): query (cache) '77.236.7.3.in-addr.arpa/PTR/IN' denied
Jun 08 01:19:57 wadp.paxon.tech named[906]: client @0x7fda100a9060 88.80.186.137#62351 (3-7-236-77-60bec111.spiderprobe.com): query (cache) '3-7-236-77-60bec111.spiderprobe.com/A/IN' denied
Jun 08 01:27:49 wadp.paxon.tech named[906]: client @0x7fda100a9060 203.159.80.44#40901 (rnp.br): query (cache) 'rnp.br/A/IN' denied
Jun 08 01:42:38 wadp.paxon.tech named[906]: client @0x7fda100a9060 120.79.20.228#10243 (nordstrom.com): query (cache) 'nordstrom.com/TXT/IN' denied
Jun 08 03:45:05 wadp.paxon.tech named[906]: client @0x7fda100a9060 74.82.47.18#56542 (dnsscan.shadowserver.org): query (cache) 'dnsscan.shadowserver.org/A/IN' denied
Jun 08 04:35:29 wadp.paxon.tech named[906]: client @0x7fda100a9060 211.65.193.150#34996 (3_7_236_77andcasdu.msyv4.njnet.edu.cn): query (cache) '3_7_236_77andcasdu.msyv4.njnet.edu.cn/A/IN' denied
Jun 08 05:56:27 wadp.paxon.tech systemd[1]: named.service: main process exited, code=killed, status=9/KILL
Jun 08 05:56:27 wadp.paxon.tech systemd[1]: Unit named.service entered failed state.
Jun 08 05:56:27 wadp.paxon.tech systemd[1]: named.service failed.