@SdkInternalApi
    final DBInstance executeStartDBInstance(StartDBInstanceRequest startDBInstanceRequest) {

        ExecutionContext executionContext = createExecutionContext(startDBInstanceRequest);
        AWSRequestMetrics awsRequestMetrics = executionContext.getAwsRequestMetrics();
        awsRequestMetrics.startEvent(Field.ClientExecuteTime);
        Request<StartDBInstanceRequest> request = null;
        Response<DBInstance> response = null;

        try {
            awsRequestMetrics.startEvent(Field.RequestMarshallTime);
            try {
                request = new StartDBInstanceRequestMarshaller().marshall(super.beforeMarshalling(startDBInstanceRequest));
                // Binds the request metrics to the current request.
                request.setAWSRequestMetrics(awsRequestMetrics);
                request.addHandlerContext(HandlerContextKey.CLIENT_ENDPOINT, endpoint);
                request.addHandlerContext(HandlerContextKey.ENDPOINT_OVERRIDDEN, isEndpointOverridden());
                request.addHandlerContext(HandlerContextKey.SIGNING_REGION, getSigningRegion());
                request.addHandlerContext(HandlerContextKey.SERVICE_ID, "RDS");
                request.addHandlerContext(HandlerContextKey.OPERATION_NAME, "StartDBInstance");
                request.addHandlerContext(HandlerContextKey.ADVANCED_CONFIG, advancedConfig);

            } finally {
                awsRequestMetrics.endEvent(Field.RequestMarshallTime);
            }

            StaxResponseHandler<DBInstance> responseHandler = new StaxResponseHandler<DBInstance>(new DBInstanceStaxUnmarshaller());

            response = invoke(request, responseHandler, executionContext);

            return response.getAwsResponse();

        } finally {

            endClientExecution(awsRequestMetrics, request, response);
        }
    }
<p>
Starts an Amazon RDS DB instance that was stopped using the Amazon Web Services console, the stop-db-instance CLI
command, or the <code>StopDBInstance</code> operation.
</p>
<p>
For more information, see <a
href="https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_StartInstance.html"> Starting an Amazon RDS DB
instance That Was Previously Stopped</a> in the <i>Amazon RDS User Guide.</i>
</p>
<note>
<p>
This command doesn't apply to RDS Custom, Aurora MySQL, and Aurora PostgreSQL. For Aurora DB clusters, use
<code>StartDBCluster</code> instead.
</p>
</note>

@param startDBInstanceRequest
@return Result of the StartDBInstance operation returned by the service.
@throws DBInstanceNotFoundException
        <code>DBInstanceIdentifier</code> doesn't refer to an existing DB instance.
@throws InvalidDBInstanceStateException
        The DB instance isn't in a valid state.
@throws InsufficientDBInstanceCapacityException
        The specified DB instance class isn't available in the specified Availability Zone.
@throws DBSubnetGroupNotFoundException
        <code>DBSubnetGroupName</code> doesn't refer to an existing DB subnet group.
@throws DBSubnetGroupDoesNotCoverEnoughAZsException
        Subnets in the DB subnet group should cover at least two Availability Zones unless there is only one
        Availability Zone.
@throws InvalidDBClusterStateException
        The requested operation can't be performed while the cluster is in this state.
@throws InvalidSubnetException
        The requested subnet is invalid, or multiple subnets were requested that are not all in a common VPC.
@throws InvalidVPCNetworkStateException
        The DB subnet group doesn't cover all Availability Zones after it's created because of users' change.
@throws DBClusterNotFoundException
        <code>DBClusterIdentifier</code> doesn't refer to an existing DB cluster.
@throws AuthorizationNotFoundException
        The specified CIDR IP range or Amazon EC2 security group might not be authorized for the specified DB
        security group.</p>
        <p>
        Or, RDS might not be authorized to perform necessary actions using IAM on your behalf.
@throws KMSKeyNotAccessibleException
        An error occurred accessing an Amazon Web Services KMS key.
@sample AmazonRDS.StartDBInstance
@see <a href="http://docs.aws.amazon.com/goto/WebAPI/rds-2014-10-31/StartDBInstance" target="_top">AWS API
     Documentation</a>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/AmazonRDSClient.java