FWIW: I just looked at it now, and I found one part of the problem:

>>   so mpi_preconnect_all is a deprecated synonym to a non-existing parameter.

The output clearly shows it is a synonym of mpi_preconnect_mpi. This param 
exists, and it is registered in ompi_mpi_register_params. However, that 
function isn’t called by ompi_info.

Nathan: I’ll leave it to you


> On May 11, 2015, at 2:10 PM, Nathan Hjelm <hje...@lanl.gov> wrote:
> 
> Hmm, that shouldn't be happening. Will take a look now.
> 
> -Nathan
> 
> On Mon, May 11, 2015 at 04:51:43PM -0400, George Bosilca wrote:
>>   I was looking to preconnect all MPI processes to remove some weird
>>   behaviors. As I did not remembered the full name I hope to get that from
>>   the ompi_info.
>>   $ ompi_info -a -l 9  | grep preco
>>                    MCA mpi: parameter "mpi_preconnect_all" (current value:
>>   "false", data source: default, level: 9 dev/all, type: bool, deprecated,
>>   synonym of: mpi_preconnect_mpi)
>>   so mpi_preconnect_all is a deprecated synonym to a non-existing parameter.
>>   So be it!
>>   I then added "mpi_preconnect_mpi = true" to my
>>   $(HOME).opemmpi/mca-params.conf file.
>>   ompi_info -a -l 9  | grep preco
>>                    MCA mpi: parameter "mpi_preconnect_all" (current value:
>>   "true", data source: file ((null)), level: 9 dev/all, type: bool,
>>   deprecated, synonym of: mpi_preconnect_mpi)
>>   While the change has been detected, the MCA system somehow got confused to
>>   where this change is coming from (the source file is (null)). Not very
>>   user friendly.
>>     George.
> 
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