Sign Up to our social questions and Answers Engine to ask questions, answer people’s questions, and connect with other people.
Login to our social questions & Answers Engine to ask questions answer people’s questions & connect with other people.
Lost your password? Please enter your email address. You will receive a link and will create a new password via email.
Please briefly explain why you feel this question should be reported.
Please briefly explain why you feel this answer should be reported.
Please briefly explain why you feel this user should be reported.
I’m running a rails 3 application running on unicorn, every now and then I get this message:
Error opening file for reading: Permission denied
and that’s it. I don’t know what file or what component is trying to opening it. It doesn’t happen on each request or any other external event that I can figure out.
Any ideas what might be going on or how to try to figure it out?
I tried searching for “Error opening file for reading” on all the gems I’m using, with no luck.
I started seeing this from time to time in Passenger logs after upgrading to ubuntu 12.04.
I narrowed it down to some image processing and it apparently comes from Ubuntu’s patches to
libjpeg-turbolibrary.It is trying to access
/proc/self/auxvto determine some system capabilities, but that proc file seems not to be always readable, presumably after a process setuid()s to another user when dropping privileges.As far as I can tell, the library works even if that fails, so it shouldn’t cause any major issues.
There seems to be a related bug report at
https://bugs.launchpad.net/ubuntu/+source/virtualbox/+bug/1014487