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From "ChiaHung Lin" <>
Subject Re: Hang problem
Date Fri, 23 Sep 2011 12:04:21 GMT

Do we have log and some detail such as how it is executed (or some custom debug output for
figuring out its execution order), etc.? 

In addition, It might help check other settings e.g. if /tmp is full. Previously I encountered
job hanging forever issue, but that's because the /tmp size is too small. Cleaning /tmp or
switching temp dir where bsp writes to fixes the problem. 

But it may be also the flaw in code (it would be good if anyone can help review the patch
that may spot some issues that I did not notice) or if in the case that double barrier in
fact does not work, then we need to switch using e.g. polling that Vinod suggests. 

-----Original message-----
From:Edward J. Yoon <>
Date:Fri, 23 Sep 2011 19:20:58 +0900
Subject:Re: Hang problem

P.S., Tested on 16 nodes using 10 tasks per node.

On Fri, Sep 23, 2011 at 7:19 PM, Edward J. Yoon <> wrote:
> Hi,
> Today I ran the sssp example with 4GB sample file.
> At 32th step, some tasks are finished and others hang forever.
> Could anyone figure out this problem?
> Plus, there're too many INFO-level logs. Let's reduce them.
> Thanks.
> --
> Best Regards, Edward J. Yoon
> @eddieyoon

Best Regards, Edward J. Yoon

ChiaHung Lin
Department of Information Management
National University of Kaohsiung

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