Setting UCX_LOG_LEVEL=error suppresses the messages.

There may be release eager messages.

If anyone is interested, this is the GitHub Issue:

On Sun, Sep 8, 2019 at 11:37 AM Bennet Fauber <> wrote:
> I am posting this here, first, as I think these questions are probably
> OpenMPI related and not related specifically to parallel HDF5.
> I am trying to get parallel HDF5 installed, but in the `make check`, I
> am getting many, many warnings of the form
> -----
> mpool.c:38   UCX  WARN  object 0x2afbefc67fc0 was not returned to
> mpool ucp_am_bufs
> -----
> Is there is an environment variable that I can set to disable printing
> of the UCX WARN messages?  I'm not finding anything obvious.
> ompi_info shows
>              MCA pml ucx: parameter "pml_ucx_verbose" (current value: "0", 
> data
> source: default, level: 9 dev/all, type: int)
>                           Verbose level of the UCX component
> but that is already set to 0, which I take to mean the least verbose.
> What does that warning message actually mean?  Is it benign?  This is
> being run in ph5diff, so short test programs.  I saw something at UCX
> for a related message that the UCX developer said was because of a
> missing MPI_Wait().
> Thanks,    -- bennet
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