[HDDS-1950] S3 MPU part-list call fails if there are no parts

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.5.0
• Component/s: S3
• Labels: pull-request-available
• Target Version/s: 0.5.0
• Assignee: Marton Elek
• Reporter: Marton Elek
• Created: 10/Aug/19 12:32
• Updated: 24/Feb/20 20:55
• Resolved: 28/Aug/19 19:15

Description

If an S3 multipart upload is created but no part is upload the part list can't be called because it throws HTTP 500:

Create an MPU:

aws s3api --endpoint http://localhost:9999 create-multipart-upload --bucket=docker --key=testkeu                                         
{
    "Bucket": "docker",
    "Key": "testkeu",
    "UploadId": "85343e71-4c16-4a75-bb55-01f56a9339b2-102592678478217234"
}

List the parts:

aws s3api --endpoint http://localhost:9999 list-parts  --bucket=docker --key=testkeu --upload-id=85343e71-4c16-4a75-bb55-01f56a9339b2-102592678478217234

It throws an exception on the server side, because in the KeyManagerImpl.listParts the ReplicationType is retrieved from the first part:

        HddsProtos.ReplicationType replicationType =
            partKeyInfoMap.firstEntry().getValue().getPartKeyInfo().getType();

Which is not yet available in this use case.

Issue Links

• links to: GitHub Pull Request #1278