about ialltoallw

[mathbird]

Hi,

ialltoallvw_zero.c.txt

The attached test code pass with MPICH well, but has problems with OpenMPI.

There are three tests in the code, the first passes, the second one hangs, and the third one results in seg. fault and core dump.

The hanging seemed caused by the handle in the function ompi_coll_libnbc_ialltoallw in mca/coll/libnbc/nbc_ialltoallw.c, where it is not set correctly for the request, based on the input parameters.

The the seg fault is caused by ompi_datatype_type_size(sendtypes[me], &sendtype_size); //sendtypes[me] = NULL.

any suggestion?

Dahai

[ggouaillardet]

@mathbird thanks for the report, a few fixes were not backported into the v2 branches, and i made PR for both.
fwiw, master and v3.x are fine
btw, which Open MPI version are you running ?

[mathbird]

I am using openmpi 2.1. with your updated code, the tests did pass. Thanks

[hppritcha]

@ggouaillardet can this issue be closed now?

[ggouaillardet]

yes, the issue is fixed from v2, so let's close this issue