What does these errors mean? How to get rid of them?

Delete "NoLagg", problem solved.

Use PTweaks for performance rather than NoLagg.

 

@WoAyumi
What version of Craftbukkit are you running?

The problem is with NoLagg, but if you are using any version of Crafbukkit for 1.0.0 - this will be why these errors are popping up. There is quite a few changes in the biome/chunk code between 1.8.1 and 1.0.0. Either try PTweaks like said above or wait until NoLagg updates for 1.0.0 .

|Shadrx

 

I tried NoLagg on my server. The amount of chunk errors I got.

 

With what build of Craftbukkit?

I haven't tried out NoLagg - so you may be right. I was just making sure.

 

It was 1317 to 1337...

 

Then removing NoLagg will fix your issue then.

Sorry for doubting you.

This is why we think it is NoLagg Causing the errors:
011-11-24 02:37:57 [SEVERE] at com.bergerkiller.bukkit.nolagg.ChunkOperation.execute(ChunkOperation.java:147)

Are you sure your getting the same errors without NoLagg?

EDIT by Moderator: merged posts, please use the edit button instead of double posting.

 

Honesty, I have seen a lot that of different chunk problems with people running CB 1.0.0. I think honestly people should just wait until a stable version of CB 1.0.0 is released.

 

Shouldn't, since that map part is not loaded.

 

@WoAyumi
You wait until a Recommend Build is released. That should fix it. It's to do with the server core itself - not any plugins.