Same thing this guy said which never got a response from anyone:
Is there something I don’t know about explosive arrows? We had players in our server melt our anti-climb on our tier 3 pillar base in just 3 minutes using only arrows. no trebuchets, no place to put down jars. Just 2 players spamming explosive arrows for 3 minutes were able to break about 7 pieces of anti-climb fence foundations and two ceilings to blow their way into our base. When the arrows hit the building they were generating massive explosions like you would expect from a jar.