[Pkg-openmpi-maintainers] Bug#845594: openmpi-bin: MPI_Comm_spawn fails if blt_tcp_if_include is set to lo

[Alastair McKinstry]

Hi,

How have you been turning "networking on/off" ?

I have been testing this using a local version of head-of-tree (soon to
be openmpi 2.0.2). This is head-of-tree as of Nov 25, with some local
fixes needed for Debian - adding libpmix* which was not fully included;
For me, the test case fails as advertised for unstable, works for me (tm).

I'm uploading my working version to experimental for further tests.

regards
Alastair


On 01/12/2016 15:04, Thibaut Paumard wrote:
> Hi,
>
> I have made a couple of additional tests.
>
> I have run
>  mpirun --mca btl_tcp_if_include lo --mca btl tcp,self -np 2 \
>         --mca plm_rsh_agent /bin/true slave
> under a variety of environments. I get a surprising result: it works in
> a sid chroot in some circumstances.
>
> Results:
>
> - plain jessie, networking on:                   PASS
> - plain jessie, networking off:                  PASS
> - jessie VirtualBox, networking on:              PASS
> - jessie VirtualBox, networking off:             PASS
> - jessie chroot (jessie host), networking on:    PASS
> - jessie chroot (jessie host), networking off:   PASS
>
> - unstable chroot (jessie host), networking on:  PASS
> - unstable chroot (jessie host), networking off: FAIL
> - unstable VirtualBox:                           FAIL
>
> I attach the error log from the attempt "unstable chroot (jessie host),
> networking off".
>
>
> Kind regards, Thibaut.
>
> Le 25/11/2016 à 08:51, Thibaut Paumard a écrit :
>> Control: retitle 845594 "openmpi: lo interface broken in the tcp btl"
>>
>> Hi,
>>
>> Actually the regression can also be demonstrated without using
>> MPI_Comm_spawn with:
>>  mpirun -np 2 --mca btl_tcp_if_include lo --mca btl tcp,self ./slave
>>
>> The above command runs fine under jessie (openmpi 1.6.5-9.1) but fails
>> under sid.
>>
>> For the record my test environment is a production machine for jessie
>> and a virtualbox virtual machine for sid.
>>
>> Kind regards, Thibaut.
>>

-- 
Alastair McKinstry, <alastair at sceal.ie>, <mckinstry at debian.org>, https://diaspora.sceal.ie/u/amckinstry
Misentropy: doubting that the Universe is becoming more disordered.