[petsc-users] Debugging hints welcome

[Jed Brown]

On Wed, Jul 13, 2011 at 15:08, Clemens Domanig
<clemens.domanig at uibk.ac.at>wrote:

> The program uses MPI for parallel solving (LU, mumps).
> It works fine with all examples that have onyl 5 dof per node and that have
> a mixture of 5 and 6 dof per node.
> When doing examples that have 6 dof per node this happens:
> * when using more than 2 MPI processes everything seems to be fine.
> * when using 1 or 2 MPI processes MatAssemblyBegin() never finishes
>

It just hangs? Can you attach a debugger and get a stack trace?

$ gdb -p PID
[output from attaching]
(gdb) bt full
[send this output]
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