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I have been building/running some simple parallel code (specifically, from https://github.com/modern-fortran, any of the example projects such as tsunami or weather-buoys). When using openmpi v4.1.5 (Fedora 39), everything built/ran as expected. Upon upgrading to Fedora 40, openmpi was also upgraded to v5.0.2 and the code, though running correctly and finishing, issues copious amounts of osc_ucx_component.c:369 errors as shown in the attached screenshot. Downgrading openmpi back to v4.1.5 eliminates the errors.
What version of Open MPI are you using? (e.g., v4.1.6, v5.0.1, git branch name and hash, etc.)
Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)
packages installed from fedora repositories, OpenCoarrays downloaded from opencoarrays.org and built locally
If you are building/installing from a git clone, please copy-n-paste the output from git submodule status.
Please describe the system on which you are running
Operating system/version: linux kernel 6.8.7 and several predecessors
Computer hardware: Intel i7 12700KF, Asus Z-690 motherboard
Network type:
Details of the problem
Please describe, in detail, the problem that you are having, including the behavior you expect to see, the actual behavior that you are seeing, steps to reproduce the problem, etc. It is most helpful if you can attach a small program that a developer can use to reproduce your problem.
Using v5.0.2, code runs but issues copious osc_ucx_component.c:369 errors as shown in the attached screenshot
Using v4.1.5, code runs without issuing errors
Does not seem to affected by version of linux, gfortran, or OpenCoarrays used
install gfortran from fedora repositories, build OpenCoarrays from opencoarrays.org
Thank you for taking the time to submit an issue!
Background information
I have been building/running some simple parallel code (specifically, from https://github.com/modern-fortran, any of the example projects such as tsunami or weather-buoys). When using openmpi v4.1.5 (Fedora 39), everything built/ran as expected. Upon upgrading to Fedora 40, openmpi was also upgraded to v5.0.2 and the code, though running correctly and finishing, issues copious amounts of osc_ucx_component.c:369 errors as shown in the attached screenshot. Downgrading openmpi back to v4.1.5 eliminates the errors.
What version of Open MPI are you using? (e.g., v4.1.6, v5.0.1, git branch name and hash, etc.)
v4.1.5 (works correctly)
v5.0.2 (issues osc_ucx_component errors)
Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)
packages installed from fedora repositories, OpenCoarrays downloaded from opencoarrays.org and built locally
If you are building/installing from a git clone, please copy-n-paste the output from
git submodule status
.Please describe the system on which you are running
Details of the problem
Please describe, in detail, the problem that you are having, including the behavior you expect to see, the actual behavior that you are seeing, steps to reproduce the problem, etc. It is most helpful if you can attach a small program that a developer can use to reproduce your problem.
Using v5.0.2, code runs but issues copious osc_ucx_component.c:369 errors as shown in the attached screenshot
Using v4.1.5, code runs without issuing errors
Does not seem to affected by version of linux, gfortran, or OpenCoarrays used
(Attached screenshot is from running tsunami/ch08. Code from weather-buoys also exhibits this behavior.)
Note: If you include verbatim output (or a code block), please use a GitHub Markdown code block like below:
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