They are leak check warnings. They indicate not all datatype handles are freed (via MPI_Type_free). We understand not all users care about these handle leaks, thus this warning will be disabled by default in the next release.

-- 
Hui Zhou

From: Mccall, Kurt E. (MSFC-EV41) via discuss <discuss@mpich.org>
Date: Tuesday, July 23, 2024 at 11:08 AM
To: discuss@mpich.org <discuss@mpich.org>
Cc: Mccall, Kurt E. (MSFC-EV41) <kurt.e.mccall@nasa.gov>
Subject: [mpich-discuss] yaksa: leaked handle pool objects

In my MPICH 4. 1. 2 application, I am getting a few of these warnings, when MPI_Finalize is called. [WARNING] yaksa: 2 leaked handle pool objects Is there any way to tell where/why they are occurring? Thanks, Kurt .

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In my MPICH 4.1.2 application, I am getting a few of these warnings, when MPI_Finalize is called.

[WARNING] yaksa: 2 leaked handle pool objects

Is there any way to tell where/why they are occurring?

Thanks,

Kurt

.