finished in UploadServer.init not working correctly

[janus-reith]

It seems like the finished method is performed before the file is uploaded?
Example:
finished: function(fileInfo, formFields) {
console.log(Assets.getText(fileInfo.name));
}

This results in 100% of Failed: Unexpected error. 503 Service Unavailable
Console outputs: Error: Unknown asset: test.json

After the server restarts, and the file is in the upload dir already(I set overwrite: true),
the same thing works fine without errors.

Did I misunderstand the purpose of the finished-parameter?
An action that is performed after the file has been uploaded.