Hi, I am setting up preCICE on a cluster and in some configurations I get the following error [com::MPIDirectCommunication]:118 in getLeaderRank: ERROR: Unknown accessor name "BiotSolverMaster"! and I have no idea where this comes from. Some quick facts: My simulation has two participants name…

[image] uekerman: In our experience, sockets are more reliable, but MPI is definitely worth a try. Then I willstick with sockets for the moment. [image] uekerman: Is there no infiniband? ib0 or similar? Normally this is crucial, with lo you can only connect to sockets on the same node. …

Some observation: It seems that starting the executable inside the jobscript with time srun --mpi=pmi2 -n 12 python3 biot_solver.py biot.input > biotsolver-${SLURM_JOBID}.log 2>&1 & instead of mpirun makes the error getLeaderRank: ERROR: Unknown accessor name disappear. The hanging of the simu…

Hi @ajaust , Your job script indeed looks desparate :see_no_evil: What is your preCICE config? Do you use MPI or TCP/IP for m2n communication? If TCP/IP which network do you use? What is missing in your job script is to pin your mpi jobs to nodes like done here . In the past we also had problems w…

Thanks! At the moment I can say that starting the job from my jobscript with time srun --mpi=pmi2 -n 12 made the situation a bit more stable, but the simulation still tends to hand in the beginning where both solvers just show [impl::SolverInterfaceImpl]:232 in initialize: Setting up slaves communic…

[image] ajaust: Would you recommend trying the MPI communication interface? My libraries and solver a are built on top of MPICH so the support should be better than for OpenMPI. In our experience, sockets are more reliable, but MPI is definitely worth a try. [image] ajaust: I have tried …

getLeaderRank: ERROR: Unknown accessor name

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getLeaderRank: ERROR: Unknown accessor name

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