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S3 Encountering the 'NoSuchUpload' error when working with S3 multipart uploads.

The specified multipart upload does not exist, possibly due to an incorrect upload ID or the upload not being initiated.

Understanding Amazon S3 and Multipart Uploads

Amazon Simple Storage Service (S3) is a scalable object storage service used for storing and retrieving any amount of data at any time. It is designed to make web-scale computing easier for developers. One of the features of S3 is multipart upload, which allows you to upload large objects in parts, improving the upload speed and reliability.

Identifying the 'NoSuchUpload' Error

When working with S3 multipart uploads, you might encounter the 'NoSuchUpload' error. This error indicates that the specified multipart upload does not exist. It usually occurs when the upload ID is incorrect or the multipart upload was not initiated properly.

Explaining the 'NoSuchUpload' Error

What Causes the Error?

The 'NoSuchUpload' error is triggered when you attempt to complete, abort, or list parts of a multipart upload using an invalid upload ID. This can happen if the upload ID is mistyped or if the upload session was never started.

Common Scenarios

Common scenarios include using an expired or incorrect upload ID, or attempting to interact with an upload that was never initiated.

Steps to Resolve the 'NoSuchUpload' Error

Step 1: Verify the Upload ID

Ensure that you are using the correct upload ID. You can list all ongoing multipart uploads using the AWS CLI:

aws s3api list-multipart-uploads --bucket your-bucket-name

This command will return a list of all multipart uploads, including their upload IDs.

Step 2: Initiate the Multipart Upload

If the upload ID is not found, you may need to initiate a new multipart upload. Use the following command to start a new upload:

aws s3api create-multipart-upload --bucket your-bucket-name --key your-object-key

This command will return a new upload ID that you can use for subsequent parts of the upload.

Additional Resources

For more information on handling multipart uploads, refer to the AWS S3 Multipart Upload Overview and the AWS CLI S3API Command Reference.

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