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Subject: Re: [OMPI users] Minor bug: invalid values for opal_signal MCA parameter cause internal error
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2013-03-26 17:48:01


Just curious -- what docs are you referring to? I don't see opal_signal referred to in the README, orterun.1, or the faq...

On Mar 20, 2013, at 11:32 AM, Ralph Castain <rhc_at_[hidden]> wrote:

> Simple to do - I added a clearer error message to the trunk and marked it for inclusion in the eventual v1.7.1 release. I'll have to let someone else do the docs as I don't fully grok the rationale behind it.
>
> Thanks
>
> On Mar 18, 2013, at 12:56 PM, Jeremiah Willcock <jewillco_at_[hidden]> wrote:
>
>> If a user gives an invalid value for the opal_signal MCA parameter, such as in the command:
>>
>> mpirun -mca opal_signal x /bin/ls
>>
>> the error produced by Open MPI 1.6.3 is:
>>
>> --------------------------------------------------------------------------
>> It looks like opal_init failed for some reason; your parallel process is
>> likely to abort. There are many reasons that a parallel process can
>> fail during opal_init; some of which are due to configuration or
>> environment problems. This failure appears to be an internal failure;
>> here's some additional information (which may only be relevant to an
>> Open MPI developer):
>>
>> opal_util_register_stackhandlers failed
>> --> Returned value -5 instead of OPAL_SUCCESS
>> --------------------------------------------------------------------------
>>
>> which claims to be an internal error, not an invalid argument given by a user. That parameter also appears to be poorly documented in general (mentioned in ompi_info -a and on the mailing lists), and seems like it would be an incredibly useful debugging tool when running a crashing application under a debugger.
>>
>> -- Jeremiah Willcock
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-- 
Jeff Squyres
jsquyres_at_[hidden]
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