处理MPICH中的错误的方法

碰到了两次了，写下来备忘！

error message:

$ mpdboot -f file :

failed to ping mpd on ... ; recvd output={}

solution:

1. just make sure, you got a correct working /etc/hosts file ...

... "akin" problem ... same error_message: mpicheck /etc/hosts

2. verify, you are using the SAME "MPD_SECRETWORD" defined in /etc/mpd.conf on every machine must user secretword=12345 ,can't write like mpd_secretword=12345

3. verify, mpich2 is available on every machine in the same directory and
the environment variables PATH and LD_LIBRARY_PATH are set properly