topic integer overflow for MPI_COMM_WORLD ref-counting in MPI_Iprobe in Intel® MPI Library https://community.intel.com/t5/Intel-MPI-Library/integer-overflow-for-MPI-COMM-WORLD-ref-counting-in-MPI-Iprobe/m-p/1137361#M5790 <P>Calling 2^31 times MPI_Iprobe results in the following error:</P><P>Abort(201962501) on node 0 (rank 0 in comm 0): Fatal error in PMPI_Iprobe: Invalid communicator, error stack:<BR />PMPI_Iprobe(123): MPI_Iprobe(src=MPI_ANY_SOURCE, tag=MPI_ANY_TAG, MPI_COMM_WORLD, flag=0x7ffd925056c0, status=0x7ffd92505694) failed<BR />PMPI_Iprobe(90).: Invalid communicator</P><P>On our system it takes about 10 Minutes to perform this number of calls in a loop.</P><P><BR />The affected version is IntelMPI 2019.1.144 (based on MPICH 3.3)<BR />&nbsp;</P><P>The expected behavior is that MPI_Iprobe is neutral for the reference count of the provided communicator. Especially for MPI_COMM_WORLD, the reference count is superflous.</P> Mon, 21 Jan 2019 18:06:53 GMT Protze__Joachim 2019-01-21T18:06:53Z integer overflow for MPI_COMM_WORLD ref-counting in MPI_Iprobe https://community.intel.com/t5/Intel-MPI-Library/integer-overflow-for-MPI-COMM-WORLD-ref-counting-in-MPI-Iprobe/m-p/1137361#M5790 <P>Calling 2^31 times MPI_Iprobe results in the following error:</P><P>Abort(201962501) on node 0 (rank 0 in comm 0): Fatal error in PMPI_Iprobe: Invalid communicator, error stack:<BR />PMPI_Iprobe(123): MPI_Iprobe(src=MPI_ANY_SOURCE, tag=MPI_ANY_TAG, MPI_COMM_WORLD, flag=0x7ffd925056c0, status=0x7ffd92505694) failed<BR />PMPI_Iprobe(90).: Invalid communicator</P><P>On our system it takes about 10 Minutes to perform this number of calls in a loop.</P><P><BR />The affected version is IntelMPI 2019.1.144 (based on MPICH 3.3)<BR />&nbsp;</P><P>The expected behavior is that MPI_Iprobe is neutral for the reference count of the provided communicator. Especially for MPI_COMM_WORLD, the reference count is superflous.</P> Mon, 21 Jan 2019 18:06:53 GMT https://community.intel.com/t5/Intel-MPI-Library/integer-overflow-for-MPI-COMM-WORLD-ref-counting-in-MPI-Iprobe/m-p/1137361#M5790 Protze__Joachim 2019-01-21T18:06:53Z This error will be resolved https://community.intel.com/t5/Intel-MPI-Library/integer-overflow-for-MPI-COMM-WORLD-ref-counting-in-MPI-Iprobe/m-p/1137362#M5791 <P>This error will be resolved in Intel® MPI Library 2019 Update 3.</P> Thu, 24 Jan 2019 13:15:07 GMT https://community.intel.com/t5/Intel-MPI-Library/integer-overflow-for-MPI-COMM-WORLD-ref-counting-in-MPI-Iprobe/m-p/1137362#M5791 James_T_Intel 2019-01-24T13:15:07Z