Hi there. I have a minecraft server and was playing on it with a friend and then had to go but left it up. He then proceeded to make a huge block of TNT under the ground and the server has been lagging like crazy even after many restarts. I have tried multiple plugins to no avail. Also since it was just me and him I never backed it up thinking I could trust him.... So pretty much does anyone know of a plugin or other solution to this problem? Thanks!
Your map is corrupted, nothing to do, maybe use world guard to disable explosion and delete the blocks with world edit
If your map is corrupted as azamy250 suggests, you could try and use the tool "Chunkster". Although, I've never had a map become corrupt after even a server-crashing TNT explosion. It's worth a shot though! For future protected against this problem, I would also suggest WorldGuard.