Charm++ parallel programming system

[Sam White <white67 AT illinois.edu>]

Hi Maximilian,

The "error on request socket" you are seeing is a generic error message. We need some more information to diagnose the issue.

1. How did you build Charm++ (what was your ./build command)?
2. How did you run the program? Was it done with virtualization (more virtual ranks than processes, or +vp > +p in your run command)?
3. Where did it fail (did it reach the application's main routine)?  You can debug the failure using the "++debug" command line option or by otherwise attaching gdb.

Thanks,
Sam

On Wed, Jan 29, 2020 at 8:37 AM Maximilian Karpfinger <karpfinger.maximilian AT gmail.com> wrote:

Hello,

I hope you are having a nice day.

I am trying to get a simulation running in ExaHyPE with ampi. 

It is an mpi application, so I'm using the ampiCC wrapper.

However when compiling with AMPI the application crashes(it works without AMPI).

I'm getting the error described in the docs 6.9.12: Charmrun: error on request socket-{}-Socket closed before recv.

I have tested the hello world and pingpong cases and they work on my system.

When I set up a small application with only 1 Rank, the simulation will terminate successfully, however the same setup crashes with more than 1 Rank.

In a bigger setup it always crashes.

I'm suspecting some memory problems, but I have no idea how to fix it.

Do you have any ideas or need more information?

I hope you can help me. 

Thanks in advance and best regards,

Maximilian Karpfinger