[mpich-discuss] Error in MPI_Finalize on a simple ring test over TCP

[Thomas Ropars]

Yes sure. Here it is.

Thomas

On 07/10/2013 02:23 PM, Wesley Bland wrote:
> Can you send us the smallest chunk of code that still exhibits this error?
>
> Wesley
>
> On Jul 10, 2013, at 6:54 AM, Thomas Ropars <thomas.ropars at epfl.ch> wrote:
>
>> Hi all,
>>
>> I get the following error when I try to run a simple application implementing a ring (each process sends to rank+1 and receives from rank-1). More precisely, the error occurs during the call to MPI_Finalize():
>>
>> Assertion failed in file src/mpid/ch3/channels/nemesis/netmod/tcp/socksm.c at line 363: sc->pg_is_set
>> internal ABORT - process 0
>>
>> Does anybody else also noticed the same error?
>>
>> Here are all the details about my test:
>> - The error is generated with mpich-3.0.2 (but I noticed the exact same error with mpich-3.0.4)
>> - I am using IPoIB for communication between nodes (The same thing happens over Ethernet)
>> - The problem comes from TCP links. When all processes are on the same node, there is no error. As soon as one process is on a remote node, the failure occurs.
>> - Note also that the failure does not occur if I run a more complex code (eg, a NAS benchmark).
>>
>> Thomas Ropars
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