Why do I see the error "mpiexec: unable to start all procs; may have invalid machine names" when running a mpich2 job?
Issue
Why do I see the error "mpiexec: unable to start all procs; may have invalid machine names" when running a mpich2 job? Below is an example:
[user1@hpc ~]$ mpirun -machinefile /home/user1/machines1 -np 8 /home/user1/cplrun/testmpi
mpiexec: unable to start all procs; may have invalid machine names
remaining specified hosts:
10.0.0.1 (node-00-10.pcm)
Environment
Red Hat HPC Solution
mpich2
Subscriber exclusive content
A Red Hat subscription provides unlimited access to our knowledgebase, tools, and much more.