AWS SDK を使用して Lambda 関数を呼び出す際の再試行とタイムアウトの問題は、どのようにしてトラブルシューティングすればよいですか?

START RequestId: b81e56a9-90e0-11e8-bfa8-b9f44c99e76d Version: $LATEST
2018-07-26T14:32:27.393Z    b81e56a9-90e0-11e8-bfa8-b9f44c99e76d    [AWS ec2 undefined 40.29s 3 retries] describeInstances({})
2018-07-26T14:32:27.393Z    b81e56a9-90e0-11e8-bfa8-b9f44c99e76d    { TimeoutError: Socket timed out without establishing a connection

...

START RequestId: 3c0523f4-9650-11e8-bd98-0df3c5cf9bd8 Version: $LATEST
2018-08-02T12:33:18.958Z    3c0523f4-9650-11e8-bd98-0df3c5cf9bd8    [AWS ec2 undefined 30.596s 3 retries] describeInstances({})
2018-08-02T12:33:18.978Z    3c0523f4-9650-11e8-bd98-0df3c5cf9bd8    { TimeoutError: Connection timed out after 30s

# max_attempts: retry count / read_timeout: socket timeout / connect_timeout: new connection timeout

from botocore.session import Session
from botocore.config import Config

s = Session()
c = s.create_client('s3', config=Config(connect_timeout=5, read_timeout=60, retries={'max_attempts': 2}))

// maxRetries: retry count / timeout: socket timeout / connectTimeout: new connection timeout

var AWS = require('aws-sdk');

AWS.config.update({

    maxRetries: 2,

    httpOptions: {

        timeout: 30000,

        connectTimeout: 5000

    }

});

// setMaxErrorRetry(): retry count / setSocketTimeout(): socket timeout / setConnectionTimeout(): new connection timeout

ClientConfiguration clientConfig = new ClientConfiguration(); 

clientConfig.setSocketTimeout(60000); 
clientConfig.setConnectionTimeout(5000);
clientConfig.setMaxErrorRetry(2);

AmazonDynamoDBClient ddb = new AmazonDynamoDBClient(credentialsProvider,clientConfig);

// MaxErrorRetry: retry count / ReadWriteTimeout: socket timeout / Timeout: new connection timeout

var client = new AmazonS3Client(

    new AmazonS3Config {
        Timeout = TimeSpan.FromSeconds(5),
        ReadWriteTimeout = TimeSpan.FromSeconds(60),
        MaxErrorRetry = 2
});

// Create Session with MaxRetry configuration to be shared by multiple service clients.
sess := session.Must(session.NewSession(&aws.Config{
    MaxRetries: aws.Int(3),
}))
 
// Create S3 service client with a specific Region.
svc := s3.New(sess, &aws.Config{
    Region: aws.String("us-west-2"),
}) 

ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
// SQS ReceiveMessage
params := &sqs.ReceiveMessageInput{ ... }
req, resp := s.ReceiveMessageRequest(params)
req.HTTPRequest = req.HTTPRequest.WithContext(ctx)
err := req.Send()

Retries * (Connection timeout + Socket timeout)

3 * (10 + 30) = 120 seconds

120 + 20 = 140 seconds