AddInstanceGroups adds an instance group to a running cluster.
            
 Declaration Syntax
 Declaration Syntax| C# | 
AddInstanceGroupsResponse AddInstanceGroups( AddInstanceGroupsRequest request )
 Parameters
 Parameters- request (AddInstanceGroupsRequest)
- Container for the necessary parameters to execute the AddInstanceGroups service method.
 Return Value
 Return ValueThe response from the AddInstanceGroups 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. |