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2021 01 11 webex
#01/11/21 webex notes
- MPI Forum Issue 424
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Issue 424 was discussed - Sessions: need to update sections of standard describing initial error handler. Problem is that the FT WG's initial error handler changes are somewhat in conflict with the sessions model wrt isolation and also the use of MPI_COMM_SELF as the default fallback for the communicator to use when an error occurs during an MPI operation that is not associatd with a valid file, window, or communicator.
Howard reviewed a strawman PR that modified verbiage in Section 2.8.
More discussion led to the error handler supplied to MPI_Session_init. Unfortunately the current text states this error handler is only invoked if something goes wrong during a call to this function. A nested set of error handler's Dan described earlier in the meeting thus really doesn't fit.
The WG decided to not try and propose any text changes for 4.0, but to try and get an errata item into 4.1. This change may led to a break in compatibility with 4.0 if we decide to change the way the error handler supplied to MPI_Session_init is used.
Martin will raise the issue 424 at the upcoming virtual MPI Forum - 1/13/21.
Didn't get to this today.