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Subject: Re: [OMPI users] writev error: Bad address
From: Jeff Squyres (jsquyres) (jsquyres_at_[hidden])
Date: 2014-02-06 06:24:07


Have you tried upgrading to a newer version of Open MPI? The 1.4.x series is several generations old. Open MPI 1.7.4 was just released yesterday.

On Feb 5, 2014, at 9:58 PM, Ross Boylan <ross_at_[hidden]> wrote:

> On 1/31/2014 1:08 PM, Ross Boylan wrote:
>> I am getting the following error, amidst many successful message sends:
>> [n10][[50048,1],1][../../../../../../ompi/mca/btl/tcp/btl_tcp_frag.c:118:mca_btl_tcp_frag_send] mca_btl_tcp_frag_send: writev error (0x7f6155970038, 578659815)
>> Bad address(1)
>>
> I think I've tracked down the immediate cause: I was sending a very large object (from R--I assume serialized into a byte stream) that was over 3G. I'm not sure why it would produce that error, but it doesn't seem that surprising that something would go wrong.
>
> Ross
>> Any ideas about what is going on or what I can do to fix it?
>>
>> I am using the openmpi-bin 1.4.2-4 Debian package on a cluster running Debian squeeze.
>>
>> I couldn't find a config.log file; there is /etc/openmpi/openmpi-mca-params.conf, which is completely commented out.
>>
>> Invocation is from R 3.0.1 (debian package) with Rmpi 0.6.3 built by me from source in a local directory. My sends all use mpi.isend.Robj and the receives use mpi.recv.Robj, both from the Rmpi library.
>>
>> The jobs were started with rmpilaunch; it and the hosts file are included in the attachments. TCP connections. rmpilaunch leaves me in an R session on the master. I invoked the code inside the toplevel() function toward the bottom of dbox-master.R.
>>
>> The program source files and other background information is in the attached file. n10 has the output of ompi_info --all, and n1011 has other info for both nodes that were active (n10 was master; n11 had some slaves).
>>
>>
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-- 
Jeff Squyres
jsquyres_at_[hidden]
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