Application hangs when waiting for RackRewindableInput

[Gennady Chertanov]

Hi.

A week ago i migrated my Rails app to Rails 2.3.4 (from 2.2.2). And i
am using passenger 2.2.7 that spawns my app as a Rails app.

I faced one problem - my app hangs two or three times a day. I straced
hanged instances and founded, that they doing select call at some
descriptor. Then i discovered in lsof that descriptor is
RackRewindableInput. See what strace shows for this descriptor:

ruby 16632 deployuser 10u REG 8,1 35
1924608 (deleted) /tmp/RackRewindableInput20091207-16632-4uu3i-0

It never lies - /tmp/RackRewindableInput20091207-16632-4uu3i-0 dont
exists.

When application runs normally, there are no RackRewindableInput files
at /tmp.

Why application want to access this file and what can i do to avoid
this problem?

Thank you.

[Steve Robinson]

Hi Gennady,

I had the same issue today and the problem for me was that the disk was full. Once I cleared some space the server worked fine.

Also make sure the /tmp directory has the right permissions.

Thanks! :)