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S3 Restore operation already in progress for an S3 object.

A restore operation is already in progress for the object.

Understanding Amazon S3 and Its Purpose

Amazon Simple Storage Service (S3) is a scalable object storage service provided by AWS. It is designed to store and retrieve any amount of data from anywhere on the web. S3 is commonly used for backup and restore operations, data archiving, and as a data lake for analytics.

Identifying the Symptom: RestoreAlreadyInProgress

When working with Amazon S3, you might encounter the error code RestoreAlreadyInProgress. This error indicates that a restore operation is currently underway for the specified object, and a new restore request cannot be initiated until the current operation completes.

What You Observe

When attempting to restore an object from Amazon S3 Glacier or S3 Glacier Deep Archive, you receive an error message stating that a restore operation is already in progress.

Details About the RestoreAlreadyInProgress Issue

The RestoreAlreadyInProgress error occurs when a restore request is made for an object that is already being restored. S3 does not allow multiple restore requests for the same object simultaneously. This is to ensure data integrity and efficient resource utilization.

Why This Happens

Each restore request involves retrieving data from Glacier storage, which can take several hours. Initiating multiple requests for the same object can lead to unnecessary resource consumption and potential conflicts.

Steps to Fix the RestoreAlreadyInProgress Issue

To resolve this issue, follow these steps:

Step 1: Verify the Restore Status

Check the status of the current restore operation. You can do this using the AWS Management Console, AWS CLI, or SDKs. For example, using the AWS CLI:

aws s3api head-object --bucket your-bucket-name --key your-object-key

Look for the Restore field in the response, which indicates the status of the restore operation.

Step 2: Wait for Completion

If a restore is in progress, wait for it to complete. The time required depends on the retrieval option chosen (e.g., Expedited, Standard, or Bulk) and the size of the object.

Step 3: Initiate a New Restore Request

Once the current restore operation is complete, you can initiate a new restore request if needed. Use the AWS CLI command:

aws s3api restore-object --bucket your-bucket-name --key your-object-key --restore-request Days=1

Adjust the Days parameter to specify the number of days you want the restored object to be available.

Additional Resources

For more information on managing restore operations in Amazon S3, refer to the following resources:

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