Hi,
Am 13.06.2010 um 09:02 schrieb Zhang Linbo:
Hi,
I'm new to OpenMPI and have encountered a problem with mpiexec.
Since I need to set up the execution environment for OpenMPI programs
on the execution nodes, I use the following command line to launch an
OMPI program:
mpiexec -launch-agent /some_path/myscript ....
The problem is: the above command works fine if I invoke 'mpiexec'
without an absolute path just like above (assuming the PATH variable
is properly set), but if I prepend an absolute path to 'mpiexec',
e.g.:
/OMPI_dir/bin/mpiexec -launch-agent /some_path/myscript ....
using an absolute path is equivalent to use the --prefix option to
`mpiexec`. Both ways lead obviously to the erroneous behavior you
encounter.
then I get the following error message:
bash: -c: line 0: syntax error near unexpected token `('
bash: -c: line 0: ` PATH=/OMPI_dir/bin:$PATH ; export PATH ;
LD_LIBRARY_PATH=/OMPI_dir/lib:$LD_LIBRARY_PATH ; export
LD_LIBRARY_PATH ; /some_path/myscript /OMPI_dir/bin/(null) --
daemonize -mca ess env -mca orte_ess_jobid 1978662912 -mca
orte_ess_vpid 1 -mca orte_ess_num_procs 2 --hnp-uri
"1978662912.0;tcp://180.0.14.12:54844;tcp://190.0.14.12:54844"'
Reason seems to be, that in case of a given prefix the assembly of the
necessary command line includes some elements too much. I tried to
circumvent this by a new case in "orte/mca/plm/rsh/plm_rsh_module.c":
if (orted_prefix != NULL) {
asprintf (&final_cmd,
"%s%s%s PATH=%s/%s:$PATH ; export PATH ; "
"LD_LIBRARY_PATH=%s/%s:$LD_LIBRARY_PATH ;
export LD_LIBRARY_PATH ; "
"%s",
(opal_prefix != NULL ? "OPAL_PREFIX=" : ""),
(opal_prefix != NULL ? opal_prefix : ""),
(opal_prefix != NULL ? " ; export
OPAL_PREFIX;" : ""),
prefix_dir, bin_base,
prefix_dir, lib_base,
orted_prefix );
}
else {
asprintf (&final_cmd,
"%s%s%s PATH=%s/%s:$PATH ; export PATH ; "
"LD_LIBRARY_PATH=%s/%s:$LD_LIBRARY_PATH ;
export LD_LIBRARY_PATH ; "
"%s %s/%s/%s",
(opal_prefix != NULL ? "OPAL_PREFIX=" : ""),
(opal_prefix != NULL ? opal_prefix : ""),
(opal_prefix != NULL ? " ; export
OPAL_PREFIX;" : ""),
prefix_dir, bin_base,
prefix_dir, lib_base,
(orted_prefix != NULL ? orted_prefix : ""),
prefix_dir, bin_base,
orted_cmd);
}
The name of the agent is for sake of easiness stored in "opal_prefix"
AFAICS.
This is of course not a clean solution (as "opal_prefix" can't be used
any more), but more a proof of concept, as only sh-like shelle are
handled. Sure there are better ways to solve it. Anyway, it's a bug
and should be filed
-- Reuti
I'd like to know what causes the above problem and how should I deal
with it.
I want to use absolute pathname of mpiexec to avoid possible
inteferences
with other MPI installations. Thanks in advance.
LB
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