Ah - good to know! I did the mod anyway, so hopefully we'll do better in 1.7.5
regardless.
Thanks for the update!
Ralph
On Feb 20, 2014, at 8:42 AM, Eric Chamberland
<eric.chamberl...@giref.ulaval.ca> wrote:
> Hi Ralph,
>
> some new information about this "bug": we got a defective disk on this
> computer! Then filesystem errors occurred... The disk is now replaced since
> 2 days and everything seems to work well (the problem re-occurred since the
> last time I wrote about it).
>
> Sorry for bothering!
>
> Eric
>
>
> On 02/05/2014 11:38 AM, Ralph Castain wrote:
>> I'm afraid it isn't quite that simple, Jeff. We also have the race condition
>> at startup - multiple procs on the same machine, from the same job, will be
>> trying to create the session directory tree. At the moment, we see the fact
>> that some other proc created it and simply create our own entry underneath
>> as required. So I don't know how to tell the difference between "some other
>> proc from my job created it first" vs "this is a stale directory and should
>> be deleted".
>>
>> However, I might be able to rig something up when the daemons start, and for
>> singletons. Will give that a try
>>
>> On Feb 4, 2014, at 6:11 AM, Jeff Squyres (jsquyres) <jsquy...@cisco.com>
>> wrote:
>>
>>> On Feb 3, 2014, at 6:44 PM, Ralph Castain <r...@open-mpi.org> wrote:
>>>
>>>>> If I may suggest to test the behavior of 1.7.x... what about this: Have a
>>>>> test case that creates a bunch of files (from 0 to 65536) in
>>>>> /tmp/openmpi-sessions-${USER}... before launching an executable without
>>>>> mpirun... >:)
>>>>
>>>> Ick - it will actually only conflict if/when the pid's wrap, so it's a
>>>> pretty rare issue.
>>>
>>>
>>> Ralph: what do you think about modifying this for 1.7.5? I.e., if the pid
>>> dir already exists in the session directory, remove it. This is always
>>> safe to do (assuming /tmp is a local filesystem) because the OS will never
>>> use the same PID for 2 concurrent processes.
>>>
>>> --
>>> Jeff Squyres
>>> jsquy...@cisco.com
>>> For corporate legal information go to:
>>> http://www.cisco.com/web/about/doing_business/legal/cri/
>>>
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>
