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Subject: Re: [OMPI devel] 1.7.4rc2r30168 - odd run failure
From: Paul Hargrove (phhargrove_at_[hidden])
Date: 2014-01-10 16:55:23


Ralph,

Since this turned out to be a matter of an unsupported system
configuration, it is my opinion that this doesn't need to be addressed for
1.7.4 if it would cause any further delay.

Also, I noticed this system has lo and lo:0.
I know the TCP BTL doesn't support virtual interfaces (trac ticket 3339).
So, I mention it here in case oob:tcp has similar issues.

-Paul

On Fri, Jan 10, 2014 at 1:02 PM, Ralph Castain <rhc_at_[hidden]> wrote:

>
> On Jan 10, 2014, at 12:59 PM, Paul Hargrove <phhargrove_at_[hidden]> wrote:
>
> Ralph,
>
> This is the front end of a production cluster at NERSC.
> So, I would not be surprised if there is a fairly restrictive firewall
> configuration in place.
> However, I could't find a way to query the configuration.
>
>
> Aha - indeed, that is the problem.
>
>
> The verbose output with (only) "-mca oob_base_verbose 10" is attached.
>
> On a hunch, I tried adding "-mca oob_tcp_if_include lo" and IT WORKS!
> Is there some reason why the loopback interface is not being used
> automatically for the single-host case?
> That would seem to be a straight-forward solution to this issue.
>
>
> Yeah, we should do a better job of that - I'll take a look and see what
> can be done in the near term.
>
> Thanks!
> Ralph
>
>
> -Paul
>
>
> On Fri, Jan 10, 2014 at 12:43 PM, Ralph Castain <rhc_at_[hidden]> wrote:
>
>> Bingo - the proc can't send a message to the daemon to tell it "i'm alive
>> and need my nidmap data". I suspect we'll find that your headnode isn't
>> allowing us to open a socket for communication between two processes on it,
>> and we don't have (yet) a pipe-like mechanism to replace it.
>>
>> Can verify that by putting "-mca oob_base_verbose 10" on the cmd line -
>> should see the oob indicate that it fails to make the connection back to
>> the daemon
>>
>>
>> On Jan 10, 2014, at 12:33 PM, Paul Hargrove <phhargrove_at_[hidden]> wrote:
>>
>> Ralph,
>>
>> Configuring using a proper --with-tm=... I find that I *can* run a
>> singleton in an allocation ("qsub -I -l nodes=1 ....").
>> The case of a singleton on the front end is still failing.
>>
>> The verbose output using "-mca state_base_verbose 5 -mca
>> plm_base_verbose 5 -mca odls_base_verbose 5" is attached.
>>
>> -Paul
>>
>>
>> On Fri, Jan 10, 2014 at 12:12 PM, Ralph Castain <rhc_at_[hidden]> wrote:
>>
>>>
>>> On Jan 10, 2014, at 11:04 AM, Paul Hargrove <phhargrove_at_[hidden]> wrote:
>>>
>>> On Fri, Jan 10, 2014 at 10:41 AM, Paul Hargrove <phhargrove_at_[hidden]>wrote:
>>>
>>>>
>>>> On Fri, Jan 10, 2014 at 10:08 AM, Ralph Castain <rhc_at_[hidden]>wrote:
>>>>
>>>>> ??? that was it? Was this built with --enable-debug?
>>>>
>>>>
>>>> Nope, I missed --enable-debug. Will try again.
>>>>
>>>>
>>> OK, Take-2 below.
>>> There is an obvious "recipient list is empty!" in the output.
>>>
>>>
>>> That one is correct and expected - all it means is that you are running
>>> on only one node, so mpirun doesn't need to relay messages to another daemon
>>>
>>>
>>> -Paul
>>>
>>> $ mpirun -mca btl sm,self -np 2 -mca grpcomm_base_verbose 5 -mca
>>> orte_nidmap_verbose 10 examples/ring_c'
>>> [cvrsvc01:21200] mca:base:select:(grpcomm) Querying component [bad]
>>> [cvrsvc01:21200] mca:base:select:(grpcomm) Query of component [bad] set
>>> priority to 10
>>> [cvrsvc01:21200] mca:base:select:(grpcomm) Selected component [bad]
>>> [cvrsvc01:21200] [[45961,0],0] grpcomm:base:receive start comm
>>> [cvrsvc01:21200] [[45961,0],0] orte:util:encode_nidmap
>>> [cvrsvc01:21200] [[45961,0],0] grpcomm:bad:xcast sent to job [45961,0]
>>> tag 1
>>> [cvrsvc01:21200] [[45961,0],0] grpcomm:xcast:recv: with 1135 bytes
>>> [cvrsvc01:21200] [[45961,0],0] orte:daemon:send_relay - recipient list
>>> is empty!
>>> [cvrsvc01:21200] [[45961,0],0] orte:util:encode_nidmap
>>> [cvrsvc01:21200] [[45961,0],0] orte:util:build:daemon:nidmap packed 55
>>> bytes
>>> [cvrsvc01:21200] [[45961,0],0] PROGRESSING COLL id 0
>>> [cvrsvc01:21200] [[45961,0],0] ALL LOCAL PROCS FOR JOB [45961,1]
>>> CONTRIBUTE 2
>>> [cvrsvc01:21200] [[45961,0],0] PROGRESSING COLL id 1
>>> [cvrsvc01:21200] [[45961,0],0] ALL LOCAL PROCS FOR JOB [45961,1]
>>> CONTRIBUTE 2
>>> [cvrsvc01:21200] [[45961,0],0] PROGRESSING COLL id 2
>>> [cvrsvc01:21200] [[45961,0],0] ALL LOCAL PROCS FOR JOB [45961,1]
>>> CONTRIBUTE 2
>>> [cvrsvc01:21202] mca:base:select:(grpcomm) Querying component [bad]
>>> [cvrsvc01:21202] mca:base:select:(grpcomm) Query of component [bad] set
>>> priority to 10
>>> [cvrsvc01:21202] mca:base:select:(grpcomm) Selected component [bad]
>>> [cvrsvc01:21202] [[45961,1],0] grpcomm:base:receive start comm
>>> [cvrsvc01:21202] [[45961,1],0] ORTE_ERROR_LOG: Data for specified key
>>> not found in file
>>> /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-trunk-linux-x86_64-gcc/openmpi-1.9a1r30215/orte/runtime/orte_globals.c
>>> at line 503
>>> [cvrsvc01:21203] mca:base:select:(grpcomm) Querying component [bad]
>>> [cvrsvc01:21203] mca:base:select:(grpcomm) Query of component [bad] set
>>> priority to 10
>>> [cvrsvc01:21203] mca:base:select:(grpcomm) Selected component [bad]
>>> [cvrsvc01:21203] [[45961,1],1] grpcomm:base:receive start comm
>>> [cvrsvc01:21203] [[45961,1],1] ORTE_ERROR_LOG: Data for specified key
>>> not found in file
>>> /global/homes/h/hargrove/GSCRATCH/OMPI/openmpi-trunk-linux-x86_64-gcc/openmpi-1.9a1r30215/orte/runtime/orte_globals.c
>>> at line 503
>>>
>>>
>>>
>>> This is very weird - it appears that your procs are looking for hostname
>>> data prior to receiving the necessary data. Let's try jacking up the debug,
>>> I guess - add "-mca state_base_verbose 5 -mca plm_base_verbose 5 -mca
>>> odls_base_verbose 5"
>>>
>>> Sorry that will be rather wordy, but I don't understand the ordering you
>>> show above. It's like your procs are skipping a bunch of steps in the
>>> startup procedure.
>>>
>>> Out of curiosity, if you do have an allocation on run on it, does it
>>> work?
>>>
>>>
>>>
>>> --
>>> Paul H. Hargrove PHHargrove_at_[hidden]
>>> Future Technologies Group
>>> Computer and Data Sciences Department Tel: +1-510-495-2352
>>> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
>>> _______________________________________________
>>> devel mailing list
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>>>
>>>
>>>
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>>>
>>
>>
>>
>> --
>> Paul H. Hargrove PHHargrove_at_[hidden]
>> Future Technologies Group
>> Computer and Data Sciences Department Tel: +1-510-495-2352
>> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
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>
>
>
> --
> Paul H. Hargrove PHHargrove_at_[hidden]
> Future Technologies Group
> Computer and Data Sciences Department Tel: +1-510-495-2352
> Lawrence Berkeley National Laboratory Fax: +1-510-486-6900
> <log-fe-2.bz2>_______________________________________________
> devel mailing list
> devel_at_[hidden]
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>
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-- 
Paul H. Hargrove                          PHHargrove_at_[hidden]
Future Technologies Group
Computer and Data Sciences Department     Tel: +1-510-495-2352
Lawrence Berkeley National Laboratory     Fax: +1-510-486-6900