Hi everyone：

I am a beginner in using mpich. There was an error in installing mpich 3.2. when I ran command “ mpiexec -f machinefile -n 3 hostname", there was a error which said that:

[mpiexec@mpi1] HYDU_sock_is_local (/home/mpi/mpich-3.2/src/pm/hydra/utils/sock/sock.c:532): gethostbyname error on mpi1: Host name lookup failure

[mpiexec@mpi1] main (/home/mpi/mpich-3.2/src/pm/hydra/ui/mpich/mpiexec.c:291): unable to check if www.plaust.edu.cn is local

There was only one line in my machinefile:

mpi2

And when I tried to ping mpi2, there was an respond:

[mpi@mpi1 ~]$ ping mpi2

PING mpi2 (172.18.0.217) 56(84) bytes of data.

64 bytes from mpi2 (172.18.0.217): icmp_seq=1 ttl=64 time=1.38 ms

64 bytes from mpi2 (172.18.0.217): icmp_seq=2 ttl=64 time=0.263 ms

Is there anyone who have encountered this problem?