I made a xp/mob grinder yesterday to get one hit kills on when they drop down. However I only seem to gain xp from a few mobs. I don't believe it is the lag because I stayed for some time and still didn't gain xp. Is there some kind of plugin of sorts that makes mobs not drop xp if they are spawned from spawner?

Thank your for your help in advance

What most likely happened is the lag caused XP to delay coming out, making it take a little bit to get to you. In that time, it would bunch together using the nolag plugin, giving the appearance of only getting XP from a few mobs.

I have no issues getting xp from my grinders.

Do you seem to be getting very little xp even from a lot of mobs?

Actually, I correct myself. What happens is you are actually getting the exp, just not noticing it. Today during the minor lag, exp orbs were not appearing, yet I was still getting small amounts of exp. Making sure you are sure you aren't getting anything.

I get some but very little from large amounts of mobs.