ModifyInstanceGroups modifies the number of nodes and configuration settings of an
            instance         group. The input parameters include the new target instance count
            for the group and the         instance group ID. The call will either succeed or fail
            atomically.
            
 Declaration Syntax
 Declaration Syntax| C# | 
ModifyInstanceGroupsResponse ModifyInstanceGroups( ModifyInstanceGroupsRequest request )
 Parameters
 Parameters- request (ModifyInstanceGroupsRequest)
- Container for the necessary parameters to execute the ModifyInstanceGroups service method.
 Return Value
 Return ValueThe response from the ModifyInstanceGroups service method, as returned by ElasticMapReduce.
 Exceptions
 Exceptions| Exception | Condition | 
|---|---|
| InternalServerErrorException | Indicates that an error occurred while processing the request and that the request
            was not         completed. |