MySQL cluster error 1114 (HY000): The table 'users' is full

I have a MySQL cluster setup, There are 2 data nodes and 1 management node. We are now getting errors on our data nodes when doing inserts. ERROR 1114 (HY000): The table 'users' is full Please any help is appreciated, Is this a config issue, if so which node? each node is an Ubuntu 9 server.