update moose issue: MPI_Ineighbor_alltoallv_c

[Smikehaha]

Hello，everyone，
I'm having trouble upgrading moose.

mamba activate moose
mamba update --all

cd ~/projects/moose
git fetch origin
git rebase origin/master

cd ~/projects/cat
make clobberall
make -j4

Until now, the compilation was fine, but there was a bug when running the following command：
（OS：centos7.9）

[mm@localhost]$ cat-opt
cat-opt: symbol lookup error: /home/mm.mambaforge3/env/moose/lib/libpetsc.so.3.019: undefined symbol: MPI_Ineighbor_alltoallv_c

[GiudGiud]

Hello

Can you run ldd cat-opt

Guillaume

[lilei199908]

It also gives me an error when I run test
`test:kernels/simple_diffusion.test: Working Directory: /home/lilei2023/projects/your_app_name/test/tests/kernels/simple_diffusion
test:kernels/simple_diffusion.test: Running command:
test:kernels/simple_diffusion.test:
test:kernels/simple_diffusion.test: ################################################################################
test:kernels/simple_diffusion.test: Tester failed, reason: Application not found
test:kernels/simple_diffusion.test:
test:kernels/simple_diffusion.test ............................................ FAILED (Application not found)

Final Test Results:

test:kernels/simple_diffusion.test ............................................ FAILED (Application not found)

Ran 1 tests in 0.1 seconds. Average test time 0.0 seconds, maximum test time 0.0 seconds.
0 passed, 0 skipped, 0 pending, 1 FAILED`

[GiudGiud]

Hello

Your problem is that there are two MPI installed on the system.
One that was used during the installation of MOOSE and was installed with miniconda
and one already on your system

	libmpi.so.12 => /home/local/lib/libmpi.so.12 (0x00007f2cf8400000)

you need to make sure to only use one. Check your environment variables (PATH, LIBRARY_PATH etc) and remove mentions of your system's MPI

Guillaume

[lilei199908]

Thank you very much, I was able to get it to work after removing a PATH. One more question, although the linked libraries are not in the same PATH, but if they are the same will also report an error, why is it so?

[GiudGiud]

They are never exactly the same. They either werent compiled with the same compiler, the same compiler options or are simply not the same exact version

[lilei199908]

Got it. Thanks.