The DNS server under CentOS there are so many error log-CodePudding

May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61d8078190 172.21.75.221 # 61892 (targetednotifications-tm.trafficmanager.net) : query failed (SERVFAIL) for targetednotifications-tm.trafficmanager.net/IN/AAAA palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61bc1214d0 172.18.220.232 # 54919 (smetrics.ni.com) : query failed (SERVFAIL) for smetrics.ni.com/IN/A palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61b80fba00 172.18.169.157 # 62160 (open.acgtracker.com) : query failed (SERVFAIL) for open.acgtracker.com/IN/A palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61b8102f20 172.18.169.157 # 50435 (denis. Stalker. Upeer. Me) : query failed (SERVFAIL) for denis. Stalker. Upeer. Me/IN/at A../../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61d406e6a0 172.18.171.174 # 55211 (ocsp.comodoca.com) : query failed (SERVFAIL) for ocsp.comodoca.com/IN/A palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61d402f980 172.18.171.174 # 51434 (ocsp.comodoca.com) : query failed (SERVFAIL) for ocsp.comodoca.com/IN/A palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61c80eddb0 202.195.149.27 # 54603 (251.149.195.202. The in - addr. ARPA) : query failed (SERVFAIL) for 251.149.195.202. The in - addr. ARPA/in/PTR at../../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61e431b380 172.18.171.174 # 57354 (www.webofknowledge.com) : query failed (SERVFAIL) for www.webofknowledge.com/IN/A palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61c806a7d0 172.18.220.232 # 63914 (ds.serving-sys.com) : query failed (SERVFAIL) for ds.serving-sys.com/IN/A palawan./../../bin/named/query. C: 8580
May 27 21:04:16 dns3 named [3849] : client @ 0 x7f61b00db8d0 172.16.128.86 # 49770 (sn3301.storage.live.com) : query failed (SERVFAIL) for sn3301.storage.live.com/IN/AAAA palawan./../../bin/named/query. C: 8580
BIND up the DNS server, there are so many error log, instability in parsing is met such mistake how to solve, configuration problem or system
But, first, thanks