Uploads fail sporadically with 200 OK

[mnutt]

On a certain batch of photos (5-6MB each) I'm trying to upload ~120 of them and after the first ten, maybe 1 in 5 fails. The javascript console shows the following error:

description: "Upload failed. Server returned the status code 200!"
response: "Error: Failed to write photo to disk!"

The actual network response is a 200, although it returns a string with the error message rather than 1. Retrying usually fixes them, although with the same 1 in 5 failure rate. There is nothing at all in the grain log or the sandstorm log.

I checked out the filesystem and everything seems fine, and this happens both on my EC2 instance sandstorm as well as oasis. I'm happy to send a link to the files I'm uploading if that will help. (they're not secret or anything, but I'd rather not post them publicly)

[jkonecny12]

I have the same issue it is unusable this way.

[jparyani]

I am unable to reproduce this. Can you shoot me an email with an example set of images that cause this for you (my email is available publicly in my github profile).

[jannic]

I got the impression that this issue is related to upload speed: First, I had the same error message when uploading a batch of images. (~25 images of ~7MB each).
I noticed that the error messages started after a few images were uploaded in short succession, and the already uploaded images where still in state 'processing'. To prevent this situation, I limited the upload speed to 20MBit, which fixed the issue.
@mnut, @jkonecny12, are you using internet connections with unusually fast upload speeds?