Migrations end in error while processing attachments

Migrations end in error while processing attachments.

During the Xray Server/DC to Cloud migration, attachments are sent in chunks from Server to Cloud, sometimes the chunks are being assembled in the wrong order when reaching Xray for Jira Cloud, depending on how Xray Cloud is being notified of new files being available.

This will result in an error.

The more attachments being migrated, the more chunks being sent to Xray Cloud, the more likely for this bug to manifest itself.

For migrations with <= 400MB of compressed data in attachments this error will not occur as only one chunk is sent.