Rails - Apr 2008 - interesting find: multiple file uploads stopped on Linux

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