undefined symbol: mca_psensor_file_component

[benmenadue]

Background information

What version of Open MPI are you using? (e.g., v1.10.3, v2.1.0, git branch name and hash, etc.)

3.1.3

Describe how Open MPI was installed (e.g., from a source/distribution tarball, from a git clone, from an operating system distribution package, etc.)

release tarball, ./configure && make && make install

Please describe the system on which you are running

• Operating system/version: CentOS 6.10
• Computer hardware: various
• Network type: IB

---

Details of the problem

Launching an program produces these warnings:

[raijin7:07223] pmix_mca_base_component_repository_open: "mca_psensor_file" does not appear to be a valid psensor MCA dynamic component (ignored): /apps/openmpi/3.1.3/lib/pmix/mca_psensor_file.so: undefined symbol: mca_psensor_file_component. ret -1

There's one from each MPI process and 1 for the mpirun. The same happens regardless of whether we use the internal pmix distribution of an external build of PMIx 2.1.4.

I think the problem is a missing PMIX_EXPORT on

ompi/opal/mca/pmix/pmix2x/pmix/src/mca/psensor/file/psensor_file.h

Line 32 in 1704063

extern pmix_psensor_file_component_t mca_psensor_file_component;

I'm just testing this at the moment; if it fixes it, can I PR into the 3.1.x branch? (I can't PR it to master since these files are branch-specific.)

[benmenadue]

I just logged a PR against v3.1.x (#6057) but GitHub is being weird and giving me a 404 when I try to display it.

EDIT: and now it seems to be working fine...

[jsquyres]

Confirmed that this fix is required in v3.0.x (i.e., PR #6059) and v3.1.x (#6057) -- it is not needed in v4.0.x.

[jsquyres]

This has been merged everywhere; closing.

[spikebike]

I'm getting this with openmpi-4.0.1 compiled with PMIX-2.1.4. When I try to run:
'''
Module openmpi/4.0.1 loaded
[c5-88:17196] pmix_mca_base_component_repository_open: "mca_psensor_file" does not appear to be a valid psensor MCA dynamic component (ignored): /share/apps/pmix-2.1.4/gcc7/lib/pmix/mca_psensor_file.so: undefined symbol: mca_psensor_file_component. ret -1
'''