could you fill in the template ? Also, do you have any logs ? How do you upload, through the web interface, through the client (which OS, which version) or via simple DAV ?
You might have a look at that.
I do not have any logs about this error.
I’m using a web browser to upload files (i tried a few Chrome, Firefow or IE)
Just that on the top of the page there is an error message "Could not create file “” ".
Then follow the link about large files, there might be something wrong in your configuration, but it’s weird to me it should work already. The large files configuration is required when you use DAV through cURL, at least it’s what some tests had me thinking.
maybe you can do a direct upload without the F5 reverse proxy to rule out any problems with that (even if you think it isn’t such a problem). I think it could be possible that ownCloud 10.2.1 or some version in between changed the way files are uploaded.
It could also make sense to revert the PHP and OS upgrade to rule out any issues originating from the upgrade of both components.
Are you using the WebUI or the sync client to upload the large file? Any different behavior between the two?
I guess you’re using a logged-in user, not a public file drop (which would require additional configuration)?
That’s a lot of things that changed, that could all contribute to the error. Which version of PHP are you using now? Did you make sure all the same modules are installed and configured the same.
With version 10 it is highly recommended to use redis for file locking, which could play a role here.
Do you have multiple instances behind the proxy/load balancer? If yes, do you have some kind of sticky session? What could be happening here is that the next chunk upload gets redirected to another host. Also, do all instances have the same ownCloud instance ID, or are they all different?