interesting find: multiple file uploads stopped on Linux

rubyonrails-talk
1

Hi,

I came across something very interesting. I use attachment_fu for file uploads and mongrel_cluster for scalability. Together they should allow me to perform multiple (concurrent) file uploads. This does work with uploads started on Windows, but on Linux something strange happens: the upload started on Linux hangs.

So, if you start an upload from a Linux machine, and then start an upload from a Windows machine, the Windows upload will go through but the Linux upload will cause the browser to time out. If you start multiple uploads from a Linux machine, they will both fail. If you attempt multiple uploads from a Windows machine (or 2 different Windows machines), they all work!

I tried many combinations: different Windows, Linux and Solaris machines with different browsers (ie, mozilla, firefox, sea-monkey). You can trace the upload by looking at the /tmp folder of the web server. When a Windows upload starts, you can see a CGIXXXX-0 file growing in the /tmp folder. When the Linux upload starts, you can see a second CGIXXXX-0 file in the /tmp folder. After 1-2 seconds, the temp file corresponding to the Linux upload stops growing (while the Windows upload file continues to grow).

Does anyone know why this happens?

Thanks, Tiberiu

2

You could try it with just one mongrel and see if that helps.

3

False alarm. For some reason the IS&T group at work is somehow capping uploads. I tried it from home from a Linux machine and it works.

Tiberiu