Greetings,<br><br>we have a PDNS 2.9.21 server that is authoritative for a couple of zones. I'm investigating on recent "java.net.UnknownHostException" that came up on some Java applications few times a day.<br>


<br>During my investigation I noticed something odd in "pdns_control list" output :<br>corrupt-packets=8<br>deferred-cache-inserts=9353<br>deferred-cache-lookup= 8471<br>latency=0<br>packetcache-hit=423920330<br>


packetcache-miss=109425963<br>packetcache-size=230<br>qsize-q=0<br>query-cache-hit=723194390<br>query-cache-miss=53504339<br>recursing-answers=1593163<br>recursing-questions=1593163<br>servfail-packets=0<br>tcp-answers=1<br>


tcp-queries=2<br>timedout-packets=1<br>udp-answers=533348099<br>udp-queries=533348104<br>udp4-answers=531754936<br>udp4-queries=533348100<br>udp6-answers=0<br>udp6-queries=0<br><br>There's a significant difference between udp4-answers (531754936) and udp-answers (533348099).<br>


<br>Any clues about that ?<br>