S3 client falling over after 4-5 hours of processing 200 files per minute

[JamieClayton7]

Acknowledgements

• I have searched (https://github.com/aws/aws-sdk/issues?q=is%3Aissue) for past instances of this issue
• I have verified all of my SDK modules are up-to-date (you can perform a bulk update with go get -u github.com/aws/aws-sdk-go-v2/...)

Describe the bug

My application polls SQS for messages generated by S3 event notification on ObjectCreated. The object is pulled using GetObject, we do some processing of the ndjson file and re-upload (PutObject) the file to the bucket with updated contents. This consistently works fine for 4-5 hours on average until the client seems to fall over, with every request failing with the following error message:

api error RequestTimeout: Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.

If I restart the service, we are back to working correctly. The same client is being used across a maximum of 50 goroutines. The service is running in AWS ECS Fargate with Go version 1.22.3.

Edit: For context - each file is ~2MB.

Expected Behavior

The S3 client to consistently PutObject without error.

Current Behavior

After a period of time (4-5 hours on average), the client begins to throw the same error for every PutObject operation:

api error RequestTimeout: Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.

Reproduction Steps

const (
	OBJECT_CREATED_STATUS = "status"
	UPDATED = "updated"
)

type S3Updater[T interface{}] struct {
	*s3.Client
	FileConverter[T]
	Bucket *string
	Key *string
}

func NewS3Updater[T interface{}](client *s3.Client, fileConverter FileConverter[T]) *S3Updater[T] {
	return &S3Updater[T]{
		Client: client,
		FileConverter: fileConverter,
	}
}

func (updater S3Updater[T]) Update(ctx context.Context, val *[]T, opts ...func (Updater[T])) error {
	for _, opt := range opts {
		opt(&updater)
	}
	if updater.Bucket == nil || updater.Key == nil {
		return errors.New("invalid s3 parameters provided")
	}
	file, err := updater.FileConverter(val)
	if err != nil {
		return err
	} 
	ctx, cancel := context.WithTimeout(ctx, 30*time.Second)
	defer cancel()	
	_, err = updater.PutObject(ctx, &s3.PutObjectInput{
		Bucket: updater.Bucket,
		Key: updater.Key,
		Body: aws.ReadSeekCloser(file),
		Metadata: map[string]string{
			OBJECT_CREATED_STATUS: UPDATED,
		},
	})
	if err != nil {
		return err
	}
	return nil
}

Possible Solution

No response

Additional Information/Context

No response

AWS Go SDK V2 Module Versions Used

github.com/aws/aws-sdk-go-v2/service/s3 v1.54.2
github.com/aws/aws-sdk-go-v2 v1.27.0

Compiler and Version used

1.22.3

Operating System and version

Alpine 3.20 https://hub.docker.com/layers/library/alpine/3.20/images/sha256-216266c86fc4dcef5619930bd394245824c2af52fd21ba7c6fa0e618657d4c3b

[RanVaknin]

Hi @JamieClayton7 ,

From reading about it in similar issues on github

aws/aws-sdk-go#411
aws/aws-sdk-js#281
aws/aws-sdk-php#29
aws/aws-cli#401
aws/aws-sdk-ruby#241

It seems like this error is being thrown when the content-length sent with the failing requests does not match the actual content length of body of the request.

I'm not sure what fileConverter does in this case, and its not clear what data type file is in this case. I don't see its definition or the relevant import, but my guess is that is that its the culprit here. I suggest you try and ensure the integrity and consistency of the file before and after the conversion process. Logging the size and content of the file at different stages might help identify discrepancies. Lastly, I advise you to enable the Go SDK logger to inspect the raw request sent (try to identify the logs only for the failing requests.

You can enable the SDK logger like so:

	cfg, err := config.LoadDefaultConfig(
		context.TODO(),
		config.WithRegion("us-east-1"), // or any other region
		config.WithClientLogMode(aws.LogRequestWithBody|aws.LogResponseWithBody),
	)
	if err != nil {
		log.Fatal(err)
	}

Thanks,
Ran~

[JamieClayton7]

Thanks @RanVaknin

As aws.ReadSeekCloser function takes an io.Reader as it's argument, it should be clear what the type of the body is. I have changed the client options to RetryMaxAttempts = 10 and I haven't seen the error again. That suggests the would-be failing PutObject calls are being retried more than the SDK default maximum retry limit.

If the first X files we upload work correctly, and the remaining uploads work correctly after a brute force of retries, it suggests there is an issue server-side. The FileConverter interface impl is as follows to just double check that I'm not missing something:

func ConvertNdJson[T interface{}](val *[]T) (io.Reader, error) {
	b := make([]byte, 0)
	w := bytes.NewBuffer(b)
	enc := json.NewEncoder(w)
	for _, item := range *val {
		if err := enc.Encode(item); err != nil {
			return nil, err
		}
	}
	return w, nil
}

[RanVaknin]

Hi @JamieClayton7 ,

Thanks for the additional info. Based on what you mentioned wrt retries, it does sound like an intermittent service related issue.

In order for this to be investigated by the S3 service team, I'll need a request ID of one of the failing requests. You can see the request ID if you enable the response logging.

Thanks,
Ran~

[JamieClayton7]

@RanVaknin

Here are various failing response bodies with codes:

<Error><Code>RequestTimeout</Code><Message>Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.</Message><RequestId>KREFE2A3HA14QZFM</RequestId><HostId>oRYyCgf21gxAp3X0jnChw0qVhacR4qdwcjOI5cO7AsCSPn0o7DdhZ8Gufihyv5KeszGjY1qpU/s=</HostId></Error>

<Error><Code>RequestTimeout</Code><Message>Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.</Message><RequestId>3BFJ0PA40R8DKHZA</RequestId><HostId>DYueP8YqPCDnwv9iwpdD5eNLStnRgydSoI1xjuVncirFzSQ3BSa/+6w3Gntg1YZJ9KqPvoKDhXVW2zhs7cpAvw==</HostId></Error>

<Error><Code>RequestTimeout</Code><Message>Your socket connection to the server was not read from or written to within the timeout period. Idle connections will be closed.</Message><RequestId>RBP53G4DDET8ZNYJ</RequestId><HostId>TQjjp7AS0pO4rjo4fhPRF8zcaFri9WlLgYzfr72C8QMG3v12TTp0IZmrRQV0QoISc5jUwnD/CtA=</HostId></Error>

[JamieClayton7]

@RanVaknin is there any update to this? I've had to push a monkey patch to production to restart the container upon RequestTimeout to get around this problem.

[RanVaknin]

Hi @JamieClayton7 ,

Thanks for your patience. I had to synthesize all of the similar issues from the other SDKs, to make this ticket actionable by the S3 team. We have an internal ticket up with S3 (internal ticket #P148550293). If you have access to AWS Support via the developer console, you could open a ticket yourself and reference the ticket I created to provide more data directly to the S3 team.

I will do my best to keep you updated on the matter.

Thanks,
Ran~

[tuananh]

i also face this issue, the request id is SD8632ECNY3JT5GP if it's of any help.