Hi Jeff, Many thanks for your reply / post.
> This is most telling to me (that you have a custom-built Linux) I want to be clear that what I have is custom-built ami (Amazon machine image), which is based on (run of the mill) centos 5.5. > - pointer is invalid (which is not the case here) > - process' file descriptor table is full > - kernel's file descriptor table is full > > It would be quite surprising to run into either of the last 2 cases in a stock > Linux kernel build. Point well taken. I will re-verify that I don't have a permission problem. > One further thought -- ensure that SELinux is disabled (all the extra security > stuff). I'm guessing that Open MPI *can* run with SELinux if SELinux is > configured in a specific way, but I have no direct experience with that. I just checked and my ami does not have /etc/selinux/config file. I will update the ami, relaunch and will report back. Regards, Tena On 2/14/11 6:16 AM, "Jeff Squyres" <jsquy...@cisco.com> wrote: > On Feb 13, 2011, at 2:37 PM, Tena Sakai wrote: > >> Also, here is an idea I came up in my sleep that I want to check >> out. The ami I have been using is a centos 5.5, which I have built >> from ground up. EC2 has something called Amazon Linux ami. I >> don't know what distribution that is and I am sure it doesn't have >> R, nor openmpi. But I thought I would load these components I >> need to the Amazon Linux (again as you suggest by starting the >> simplest case) and see if I can reproduce the behavior I have >> been experiencing on different (and Amazon "official" ami). > > This is most telling to me (that you have a custom-built Linux). Now that I'm > back at a proper keyboard, I checked why pipe(2) would fail, and it only has 3 > reasons in both Linux and OS X: > > - pointer is invalid (which is not the case here) > - process' file descriptor table is full > - kernel's file descriptor table is full > > It would be quite surprising to run into either of the last 2 cases in a stock > Linux kernel build. > > One further thought -- ensure that SELinux is disabled (all the extra security > stuff). I'm guessing that Open MPI *can* run with SELinux if SELinux is > configured in a specific way, but I have no direct experience with that.
