[OMPI users] Possible bugs in MPI_Neighbor_alltoallv()

Hello, When I do MPI_Neighbor_alltoallv or MPI_Ineighbor_alltoallv, I find when either outdegree or indegree is zero, OpenMPI will return an error. The suspicious code is at pneighbor_alltoallv.c / pineighbor_alltoallv.c 101 } else if ((NULL == sendcounts) || (NULL == sdispls) || 102

Re: [OMPI users] Possible bugs in MPI_Neighbor_alltoallv()

Thanks Junchao, I issued https://github.com/open-mpi/ompi/pull/6782 in order to fix this (and the alltoallw variant as well) Meanwhile, you can manually download and apply the patch at https://github.com/open-mpi/ompi/pull/6782.patch Cheers, Gilles On 6/28/2019 1:10 PM, Zhang, Junchao