Had the same crash. Everytime a coordinate was approached, the server crashed with this exception.
Deleting the chunk and the 8 around it did not solve the problem. Our world is operating now after these steps:
1) Delete the chunk and the 8 around it.
2) Load the world in singleplayer
3) Go to the chunk. In our case the chunk got generated, but it does not fit nicely in its surroundings.
4) Copy the world back to the server and all is well again.
hans riesebos
Had the same crash. Everytime a coordinate was approached, the server crashed with this exception.
Deleting the chunk and the 8 around it did not solve the problem. Our world is operating now after these steps:
1) Delete the chunk and the 8 around it.
2) Load the world in singleplayer
3) Go to the chunk. In our case the chunk got generated, but it does not fit nicely in its surroundings.
4) Copy the world back to the server and all is well again.