Open MPI logo

Open MPI User's Mailing List Archives

  |   Home   |   Support   |   FAQ   |  

This web mail archive is frozen.

This page is part of a frozen web archive of this mailing list.

You can still navigate around this archive, but know that no new mails have been added to it since July of 2016.

Click here to be taken to the new web archives of this list; it includes all the mails that are in this frozen archive plus all new mails that have been sent to the list since it was migrated to the new archives.

Subject: Re: [OMPI users] RETRY EXCEEDED ERROR status number 12
From: Pavel Shamis (Pasha) (pashash_at_[hidden])
Date: 2009-08-21 17:44:54

You may try to use ibdiagnet tool:

The tool is part of OFED (


Prentice Bisbal wrote:
> Several jobs on my cluster just died with the error below.
> Are there any IB/Open MPI diagnostics I should use to diagnose, should I
> just reboot the nodes, or should I have the user who submitted these
> jobs just increase the retry count/timeout paramters?
> [0,1,6][../../../../../ompi/mca/btl/openib/btl_openib_component.c:1375:btl_openib_component_progress]
> from node14.aurora to: node40.aurora error polling HP CQ with status
> RETRY EXCEEDED ERROR status number 12 for wr_id 13606831800 opcode 11119
> --------------------------------------------------------------------------
> The InfiniBand retry count between two MPI processes has been
> exceeded. "Retry count" is defined in the InfiniBand spec 1.2
> (section 12.7.38):
> The total number of times that the sender wishes the receiver to
> retry timeout, packet sequence, etc. errors before posting a
> completion error.
> This error typically means that there is something awry within the
> InfiniBand fabric itself. You should note the hosts on which this
> error has occurred; it has been observed that rebooting or removing a
> particular host from the job can sometimes resolve this issue.
> Two MCA parameters can be used to control Open MPI's behavior with
> respect to the retry count:
> * btl_openib_ib_retry_count - The number of times the sender will
> attempt to retry (defaulted to 7, the maximum value).
> * btl_openib_ib_timeout - The local ACK timeout parameter (defaulted
> to 10). The actual timeout value used is calculated as:
> 4.096 microseconds * (2^btl_openib_ib_timeout)
> See the InfiniBand spec 1.2 (section 12.7.34) for more details.