MLflow Error while deploying the Model to local REST server - python-3.x

Question

System Details:
Operating System: Ubuntu 19.04
Anaconda version: 2019.03
Python version: 3.7.3
mlflow version: 1.0.0
Steps to Reproduce: https://mlflow.org/docs/latest/tutorial.html
Error at line/command: mlflow models serve -m [path_to_model] -p 1234
Error:
Command 'source activate mlflow-c4536834c2e6e0e2472b58bfb28dce35b4bd0be6 1>&2 && gunicorn --timeout 60 -b 127.0.0.1:1234 -w 4 mlflow.pyfunc.scoring_server.wsgi:app' returned non zero return code. Return code = 1
Terminal Log:
(mlflow) root#user:/home/user/mlflow/mlflow/examples/sklearn_elasticnet_wine/mlruns/0/e3dd02d5d84545ffab858db13ede7366/artifacts/model# mlflow models serve -m $(pwd) -p 1234
2019/06/18 16:15:16 INFO mlflow.models.cli: Selected backend for flavor 'python_function'
2019/06/18 16:15:17 INFO mlflow.pyfunc.backend: === Running command 'source activate mlflow-c4536834c2e6e0e2472b58bfb28dce35b4bd0be6 1>&2 && gunicorn --timeout 60 -b 127.0.0.1:1234 -w 4 mlflow.pyfunc.scoring_server.wsgi:app'
bash: activate: No such file or directory
Traceback (most recent call last):
File "/root/anaconda3/envs/mlflow/bin/mlflow", line 10, in <module>
sys.exit(cli())
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/click/core.py", line 764, in __call__
return self.main(*args, **kwargs)
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/click/core.py", line 717, in main
rv = self.invoke(ctx)
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/click/core.py", line 1137, in invoke
return _process_result(sub_ctx.command.invoke(sub_ctx))
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/click/core.py", line 956, in invoke
return ctx.invoke(self.callback, **ctx.params)
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/click/core.py", line 555, in invoke
return callback(*args, **kwargs)
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/mlflow/models/cli.py", line 43, in serve
host=host)
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/mlflow/pyfunc/backend.py", line 76, in serve
command_env=command_env)
File "/root/anaconda3/envs/mlflow/lib/python3.7/site-packages/mlflow/pyfunc/backend.py", line 147, in _execute_in_conda_env
command, rc
Exception: Command 'source activate mlflow-c4536834c2e6e0e2472b58bfb28dce35b4bd0be6 1>&2 && gunicorn --timeout 60 -b 127.0.0.1:1234 -w 4 mlflow.pyfunc.scoring_server.wsgi:app' returned non zero return code. Return code = 1
(mlflow) root#user:/home/user/mlflow/mlflow/examples/sklearn_elasticnet_wine/mlruns/0/e3dd02d5d84545ffab858db13ede7366/artifacts/model#

Answer 1

Following the steps mentioned in the GitHub Issue 1507 (https://github.com/mlflow/mlflow/issues/1507) I was able to resolve this issue.
In reference to this post, the "anaconda/bin/" directory is never added to the list of environment variables i.e. PATH variable. In order to resolve this issue, add the "else" part of conda initialize code block from ~/.bashrc file to your PATH variable.
# >>> conda initialize >>>
# !! Contents within this block are managed by 'conda init' !!
__conda_setup="$('/home/atulk/anaconda3/bin/conda' 'shell.bash' 'hook' 2> /dev/null)"
if [ $? -eq 0 ]; then
eval "$__conda_setup"
else
if [ -f "/home/atulk/anaconda3/etc/profile.d/conda.sh" ]; then
. "/home/atulk/anaconda3/etc/profile.d/conda.sh"
else
export PATH="/home/atulk/anaconda3/bin:$PATH"
fi
fi
unset __conda_setup
# <<< conda initialize <<<
In this case, I added export PATH="/home/atulk/anaconda3/bin:$PATH" to the PATH variable. However, this is just a temporary fix until the issue is fixed in the project.

Answer 2

export PATH=$PATH:/path/to/python/Python/2.7/bin
can be used when you are not using anaconda