CWOBJ0040=CWOBJ0040E: Hash based data structure over run for {0} with {1} elements in the data structure. Examine the hashCode method on this class for better distribution.
Explanation
The hash based data structure holding elements in the grid is getting too many collisions. This is likely because the hashCode method on the key class was not implemented effectively.
User response
Examine the hashCode algorithm of the class to determine whether a more distributed result is possible.