CloudBees Backup Plugin 1162

Backups to Amazon Web Services S3 could fail immediately when uploading the generated backup file. This occurred particularly when using AWS credentials with an IAM role. The client used to upload the backup was initiated at the beginning of the backup operation. Therefore, the issue occurred when generating the backup file took longer than the configured Security Token Service (STS) Token Expiration period. The session token used for uploading is now initiated right before the upload.