Server Lags and Crashes on Player Join

Server specs:
Ubuntu 11.10 Oneiric
Quadcore i7 3.4GHz
16gig DDR3
128gig SSD

Screen is allocated 14gigs.

This happens with different players every so often. When they join the server it lags the server and eventually crashes it. To fix it I can either delete the players .dat file or edit their .dat file and reset their POS.

If anyone has heard of this happening or have a fix from player dat file becoming "corrupted" that would be great. Let me know if you need more information I'll be happy to provide anything that will help solve this issue.

 

Is anyone else even getting this issue?

 

I haven't heard of that happening. Do you have a log to post?

 

i could but the only thing it shows is the player connecting then no one else can connect and chat lags in game. No errors however. Ill post the log when i get home.

 

Post your plugins list by doing "plugins" in the console.

 

Does it say "Read timed out" in terminal? I used to have that problem but it was fixed after I upgraded my internet speed.

 

I have this problem too.... when somebody login in my tickrate decreases to 12/s

 

I also have this problem. here's the error in the console that comes up right after someone joins http://pastebin.com/tPmPhj3Y. here are my plugins http://s17.postimage.org/vt9m6g72l/plugins.png