How can i set retryStrategy in client config

[ZengTianShengZ]

I try to set retryStrategy for request failure trigger retry request， I found some configuration documentation here issues， then I did try

const MAXIMUM_ATTEMPTS = 6;
const customRetryStrategy = new StandardRetryStrategy(async () => MAXIMUM_ATTEMPTS);

 const client = new S3Client({
          ...
          requestHandler: this.requestHandler,
          maxAttempts: MAXIMUM_ATTEMPTS,
          retryStrategy: customRetryStrategy,
      });

But I turn off the network theory triggered the request timeout exception， however, it did not.
SDK threw TypeError: Failed to fetch exception.

This exception is not in the scope of service-error-classification

// https://github.com/aws/aws-sdk-js-v3/blob/main/packages/service-error-classification/src/constants.ts
export var CLOCK_SKEW_ERROR_CODES = [
    "AuthFailure",
    "InvalidSignatureException",
    "RequestExpired",
    "RequestInTheFuture",
    "RequestTimeTooSkewed",
    "SignatureDoesNotMatch",
];
export var THROTTLING_ERROR_CODES = [
    "BandwidthLimitExceeded",
    "EC2ThrottledException",
    "LimitExceededException",
    "PriorRequestNotComplete",
    "ProvisionedThroughputExceededException",
    "RequestLimitExceeded",
    "RequestThrottled",
    "RequestThrottledException",
    "SlowDown",
    "ThrottledException",
    "Throttling",
    "ThrottlingException",
    "TooManyRequestsException",
    "TransactionInProgressException",
];
export var TRANSIENT_ERROR_CODES = ["AbortError", "TimeoutError", "RequestTimeout", "RequestTimeoutException"];
export var TRANSIENT_ERROR_STATUS_CODES = [500, 502, 503, 504];

As a result, the retry request cannot be initiated.

What can I do to initiate a network retry request?

[yenfryherrerafeliz]

Hi @ZengTianShengZ, thanks for reaching out. If we review the code, which here is a good point to start, we can see that when you pass your custom retry strategy, but using our implementations (StandardRetryStrategy | AdaptiveRetryStrategy), you should consider the following parameters:

• maxAttepsProvider: is the limit of attempts we will retry to execute the request.
• options:
  • retryDecider: the logic that decides if a retry should happen or not. Here you can see the default retry decider logic, which we use if this parameter is not given.
  • delayDecider: the logic that decides the delay for each attempt. Here you can see the default delay decider logic, which we use if this parameter is not given as well.

For AdaptiveRetryStrategy you could also provide an extra parameter that is options.rateLimiter, which at this time I am not really familiar with, but you are welcome to explore this code, which contains the default implementation for rate limiter. Also here is a piece of documentation that provides you a better explanation about each retry mode we have implemented.

If you have any more questions please just let me know.

Thanks!

[ZengTianShengZ]

Thankyou, I re-studied the source code and solved it.

new StandardRetryStrategy(async () => 3, {
            retryDecider: (err: any) => {
                if (err && err.message === 'Failed to fetch') {
                    return true;
                }
                return false;
            },
        });

If the official documentation has a demo, it will make me understand these concepts faster.

thanks again for your answer

[yenfryherrerafeliz]

Hi @ZengTianShengZ, I will pass your feedback about implementing demos in our official documentation, to the proper team.

And you are very welcome!

[github-actions[bot]]

Hello! Reopening this discussion to make it searchable.