Solved FPS Lag when breaking specifically stone

So I recently came on my server to finish my spawn, and whenever I break blocks and place them back, I get a BIG lag spike. This only happens with stone bricks for some reason.. This doesn't happen on singleplayer or other servers, so Is this something to do with Bukkit, the plugins I have installed, or Is it just my computer? All help would be greatly appreciated. (Also, by lag spike I mean that I lose a great amount of FPS. I usually get around 120 fps, but during the lag spike I get only 20, or 30 fps.)

 

@ElectroCat_964, plugin list please. It's probably a badly written plugin.

 

My plugins are: WorldEdit, MassiveCore, Vault, ClearLag, PermissionsEx, KillerMoney, HolographicDisplays, Essentials, EssentialsSpawn, WhatIsIt, ChestShop, EssentialsChat, and Factions.

 

@ElectroCat_964, odd. Nothing there throws a red flag (although I don't have ability to decompile whatisit I highly doubt that would cause it). I still think it's a plugin doing some kind of file IO on the block break, I just don't know what.

Anyone else have an idea?

 

I tried remove whatisit, and that didnt do a thing. Im also getting even MORE block lag. Is there some way that I can fix that?

 

@ElectroCat_964 if it's FPS lag then it's your client. Server can't do jack about a client's FPS. However excessive entities can cause client lag. Do you have a massive mob farm or lots of item frames?

 

I was thinking that but couldn't justify why breaking stone and stone alone as the OP says would cause this as a client.

 

No, I dont have any massible mob farms or item frames. If it was a problem with my client, why doesnt it happen on other servers or with other blocks? Oh, and im also getting some block lag on my server also. (Blocks dissapear then appear when I place them)

 

@ElectroCat_964 Do you have any mods installed? Have you installed or updated anything on your computer recently?

 

Thanks for all the help guys, but It turns out I just restarted my server back to it's factory settings and that resolved all the issues. Sorry for all the confusion... (Oh, and no I dont have any mods installed, well I do, just only on my singleplayer forge worlds )