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When trying to install MPICH from the apt repository on Ubuntu 24. 04 and then installing mpi4py with pip, I get a non-functional installation of mpi4py. It does not happen if I use openmpi, or downgrade to Ubuntu 22. 04. It has been tested with</div>
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<div dir="ltr"><div>When trying to install MPICH from the apt repository on Ubuntu 24.04 and then installing mpi4py with pip, I get a non-functional installation of mpi4py. It does not happen if I use openmpi, or downgrade to Ubuntu 22.04.<br></div><div><br></div><div>It has been tested with the same MPICH on other systems (See: <a href="https://urldefense.us/v3/__https://github.com/mpi4py/mpi4py/issues/547__;!!G_uCfscf7eWS!cPoueuWR7fxw1e0Sea_FpPwE69LSB-4AL5z_w7BTkhgE477ScU4TJA4tOTBUI_OpT980NxbAga-iHw$">https://github.com/mpi4py/mpi4py/issues/547</a>) for where it has been tested, leading one to believe that something is wrong with the ubuntu build.<br><br></div><div>Minimal reproducible dockerfile:<br>```</div><div><pre lang="docker" class="gmail-notranslate"><code class="gmail-notranslate">FROM ubuntu:24.04
ARG MPI="mpich"
ENV OPENBLAS_NUM_THREADS=1 \
OPENBLAS_VERBOSE=0
ENV DEB_PYTHON_INSTALL_LAYOUT=deb_system
ENV DEBIAN_FRONTEND=noninteractive
WORKDIR /tmp
RUN apt-get -qq update && \
apt-get -yq upgrade && \
apt-get -y install \
lib${MPI}-dev \
python3-dev \
python3-pip \
python3-setuptools \
python3-venv && \
apt-get clean && \
rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/*
ENV VIRTUAL_ENV=/test-env
ENV PATH=/${VIRTUAL_ENV}/bin:$PATH
RUN python3 -m venv ${VIRTUAL_ENV}
# Install Python packages (via pip)
RUN python3 -m pip install --no-cache-dir mpi4py -v
ENV OMPI_ALLOW_RUN_AS_ROOT=1 \
OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
CMD ["mpiexec", "-v", "--np", "2", "python3", "-c", "from mpi4py import MPI; print(f'{MPI.COMM_WORLD.rank}/{MPI.COMM_WORLD.size}')"]</code></pre></div><div>```<br></div><div>with the output</div><div><br></div><div>```</div><div><pre class="gmail-notranslate">host: 6a2e05040a65
[mpiexec@6a2e05040a65] Timeout <span class="gmail-pl-c1">set</span> to -1 (-1 means infinite)
==================================================================================================
mpiexec options:
----------------
Base path: /usr/bin/
Launcher: (null)
Debug level: 1
Enable X: -1
Global environment:
-------------------
PATH=//test-env/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin
HOSTNAME=6a2e05040a65
TERM=xterm
OPENBLAS_NUM_THREADS=1
OPENBLAS_VERBOSE=0
DEB_PYTHON_INSTALL_LAYOUT=deb_system
DEBIAN_FRONTEND=noninteractive
VIRTUAL_ENV=/test-env
OMPI_ALLOW_RUN_AS_ROOT=1
OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1
HOME=/root
Hydra internal environment:
---------------------------
GFORTRAN_UNBUFFERED_PRECONNECTED=y
Proxy information:
<span class="gmail-pl-k">*********************</span>
[1] proxy: 6a2e05040a65 (1 cores)
Exec list: python3 (2 processes)<span class="gmail-pl-k">;</span>
==================================================================================================
Proxy launch args: /usr/bin/hydra_pmi_proxy --control-port 6a2e05040a65:36819 --debug --rmk user --launcher ssh --demux poll --pgid 0 --retries 10 --usize -2 --pmi-port 0 --gpus-per-proc -2 --gpu-subdevs-per-proc -2 --proxy-id
Arguments being passed to proxy 0:
--version 4.2.0 --iface-ip-env-name MPIR_CVAR_CH3_INTERFACE_HOSTNAME --hostname 6a2e05040a65 --global-core-map 0,1,1 --pmi-id-map 0,0 --global-process-count 2 --auto-cleanup 1 --pmi-kvsname kvs_1_0_1589598326_6a2e05040a65 --pmi-process-mapping (vector,(0,1,2)) --global-inherited-env 11 <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>PATH=//test-env/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>HOSTNAME=6a2e05040a65<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>TERM=xterm<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>OPENBLAS_NUM_THREADS=1<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>OPENBLAS_VERBOSE=0<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>DEB_PYTHON_INSTALL_LAYOUT=deb_system<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>DEBIAN_FRONTEND=noninteractive<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>VIRTUAL_ENV=/test-env<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>OMPI_ALLOW_RUN_AS_ROOT=1<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>OMPI_ALLOW_RUN_AS_ROOT_CONFIRM=1<span class="gmail-pl-pds">'</span></span> <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>HOME=/root<span class="gmail-pl-pds">'</span></span> --global-user-env 0 --global-system-env 1 <span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>GFORTRAN_UNBUFFERED_PRECONNECTED=y<span class="gmail-pl-pds">'</span></span> --proxy-core-count 1 --exec --exec-appnum 0 --exec-proc-count 2 --exec-local-env 0 --exec-wdir /tmp --exec-args 3 python3 -c from mpi4py import MPI<span class="gmail-pl-k">;</span> print(f<span class="gmail-pl-s"><span class="gmail-pl-pds">'</span>{MPI.COMM_WORLD.rank}/{MPI.COMM_WORLD.size}<span class="gmail-pl-pds">'</span></span>)<span class="gmail-pl-k">;</span>
[mpiexec@6a2e05040a65] Launch arguments: /usr/bin/hydra_pmi_proxy --control-port 6a2e05040a65:36819 --debug --rmk user --launcher ssh --demux poll --pgid 0 --retries 10 --usize -2 --pmi-port 0 --gpus-per-proc -2 --gpu-subdevs-per-proc -2 --proxy-id 0
[proxy:0@6a2e05040a65] Sending upstream hdr.cmd = CMD_PID_LIST
[proxy:0@6a2e05040a65] Sending upstream hdr.cmd = CMD_STDOUT
[proxy:0@6a2e05040a65] Sending upstream hdr.cmd = CMD_STDOUT
0/1
0/1
[proxy:0@6a2e05040a65] Sending upstream hdr.cmd = CMD_EXIT_STATUS<br>```<br><br></pre><pre class="gmail-notranslate">Best,<br></pre><pre class="gmail-notranslate">Jørgen<br></pre></div><div><br></div><div><span class="gmail_signature_prefix">-- </span><br><div dir="ltr" class="gmail_signature" data-smartmail="gmail_signature"><div dir="ltr"><div><div><b>Jørgen S. Dokken, </b>PhD<br></div><div><span>Senior</span> <span>Research</span> <span>Engineer</span></div><div>Simula <span>Research</span> Laboratory</div><div>+47 45286467</div></div></div></div></div></div>