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Subject: Re: [OMPI users] After OS Update MPI_Init fails on one host
From: Ralph Castain (rhc_at_[hidden])
Date: 2013-07-23 15:03:33

That's understandable - if you don't disable xml2, then hwloc uses the xml2 library to do the topology encoding. We rely on their internal "quasi-xml" encoding method, which I believe provides some different data (and definitely different format). I suspect this is causing the confusion, though it is strange since we have them encode and decode it - you would think the routines come from the same place and would be compatible.

Could be something hwloc needs to look at.

On Jul 23, 2013, at 11:45 AM, "Kevin H. Hobbs" <hobbsk_at_[hidden]> wrote:

> On 07/23/2013 02:22 PM, Ralph Castain wrote:
>> Yeah, it's failing when trying to unpack the topology obtained from hwloc.
> What I find very interesting is that the hwloc configure options
> --disable-cairo --disable-libxml2 turn the bug off.
> I'll keep walking through the execution in gdb maybe I'll be able to
> narrow it down some more.
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