ray: pip install ray broken for centos python 3.6.9

i ran pip install ray on centos CentOS Linux release 7.8.2003 (Core)

(app-root) bash-4.2# cat /etc/redhat-release CentOS Linux release 7.8.2003 (Core) (app-root) bash-4.2# python --version Python 3.6.9 (app-root) bash-4.2#

pip install ray

<lots of logs>

gcc -pthread -Wno-unused-result -Wsign-compare -DDYNAMIC_ANNOTATIONS_ENABLED=1 -DNDEBUG -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -I/opt/rh/rh-python36/root/usr/include -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector-strong --param=ssp-buffer-size=4 -grecord-gcc-switches -m64 -mtune=generic -D_GNU_SOURCE -fPIC -fwrapv -fPIC -I/opt/rh/rh-python36/root/usr/include/python3.6m -c /tmp/tmp6sxpgubl/a.c -o None/tmp/tmp6sxpgubl/a.o
Traceback (most recent call last):
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/unixccompiler.py", line 128, in _compile
    extra_postargs)
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/_spawn_patch.py", line 54, in _commandfile_spawn
    _classic_spawn(self, command)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/ccompiler.py", line 909, in spawn
    spawn(cmd, dry_run=self.dry_run)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/spawn.py", line 36, in spawn
    _spawn_posix(cmd, search_path, dry_run=dry_run)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/spawn.py", line 159, in _spawn_posix
    % (cmd, exit_status))
distutils.errors.DistutilsExecError: command 'gcc' failed with exit status 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/commands.py", line 264, in build_extensions
    build_ext.build_ext.build_extensions(self)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 448, in build_extensions
    self._build_extensions_serial()
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 473, in _build_extensions_serial
    self.build_extension(ext)
  File "/opt/app-root/lib/python3.6/site-packages/setuptools/command/build_ext.py", line 196, in build_extension
    _build_ext.build_extension(self, ext)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 533, in build_extension
    depends=ext.depends)
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/_parallel_compile_patch.py", line 59, in _parallel_compile
    _compile_single_file, objects)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 266, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 644, in get
    raise self._value
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 44, in mapstar
    return list(map(*args))
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/_parallel_compile_patch.py", line 54, in _compile_single_file
    self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/commands.py", line 248, in new_compile
    pp_opts)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/unixccompiler.py", line 130, in _compile
    raise CompileError(msg)
distutils.errors.CompileError: command 'gcc' failed with exit status 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "<string>", line 1, in <module>
  File "/tmp/pip-build-1_ml838l/grpcio/setup.py", line 465, in <module>
    cmdclass=COMMAND_CLASS,
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/core.py", line 148, in setup
    dist.run_commands()
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/dist.py", line 955, in run_commands
    self.run_command(cmd)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/dist.py", line 974, in run_command
    cmd_obj.run()
  File "/opt/app-root/lib/python3.6/site-packages/setuptools/command/install.py", line 61, in run
    return orig.install.run(self)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/install.py", line 545, in run
    self.run_command('build')
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/cmd.py", line 313, in run_command
    self.distribution.run_command(command)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/dist.py", line 974, in run_command
    cmd_obj.run()
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build.py", line 135, in run
    self.run_command(cmd_name)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/cmd.py", line 313, in run_command
    self.distribution.run_command(command)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/dist.py", line 974, in run_command
    cmd_obj.run()
  File "/opt/app-root/lib/python3.6/site-packages/setuptools/command/build_ext.py", line 75, in run
    _build_ext.run(self)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 339, in run
    self.build_extensions()
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/commands.py", line 269, in build_extensions
    "Failed `build_ext` step:\n{}".format(formatted_exception))
commands.CommandError: Failed `build_ext` step:
Traceback (most recent call last):
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/unixccompiler.py", line 128, in _compile
    extra_postargs)
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/_spawn_patch.py", line 54, in _commandfile_spawn
    _classic_spawn(self, command)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/ccompiler.py", line 909, in spawn
    spawn(cmd, dry_run=self.dry_run)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/spawn.py", line 36, in spawn
    _spawn_posix(cmd, search_path, dry_run=dry_run)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/spawn.py", line 159, in _spawn_posix
    % (cmd, exit_status))
distutils.errors.DistutilsExecError: command 'gcc' failed with exit status 1

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/commands.py", line 264, in build_extensions
    build_ext.build_ext.build_extensions(self)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 448, in build_extensions
    self._build_extensions_serial()
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 473, in _build_extensions_serial
    self.build_extension(ext)
  File "/opt/app-root/lib/python3.6/site-packages/setuptools/command/build_ext.py", line 196, in build_extension
    _build_ext.build_extension(self, ext)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/command/build_ext.py", line 533, in build_extension
    depends=ext.depends)
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/_parallel_compile_patch.py", line 59, in _parallel_compile
    _compile_single_file, objects)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 266, in map
    return self._map_async(func, iterable, mapstar, chunksize).get()
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 644, in get
    raise self._value
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 119, in worker
    result = (True, func(*args, **kwds))
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/multiprocessing/pool.py", line 44, in mapstar
    return list(map(*args))
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/_parallel_compile_patch.py", line 54, in _compile_single_file
    self._compile(obj, src, ext, cc_args, extra_postargs, pp_opts)
  File "/tmp/pip-build-1_ml838l/grpcio/src/python/grpcio/commands.py", line 248, in new_compile
    pp_opts)
  File "/opt/rh/rh-python36/root/usr/lib64/python3.6/distutils/unixccompiler.py", line 130, in _compile
    raise CompileError(msg)
distutils.errors.CompileError: command 'gcc' failed with exit status 1


----------------------------------------

Command “/opt/app-root/bin/python3 -u -c “import setuptools, tokenize;file=‘/tmp/pip-build-1_ml838l/grpcio/setup.py’;f=getattr(tokenize, ‘open’, open)(file);code=f.read().replace(‘\r\n’, ‘\n’);f.close();exec(compile(code, file, ‘exec’))” install --record /tmp/pip-vs0ozs8q-record/install-record.txt --single-version-externally-managed --compile --install-headers /opt/app-root/include/site/python3.6/grpcio” failed with error code 1 in /tmp/pip-build-1_ml838l/grpcio/ You are using pip version 9.0.1, however version 20.2.3 is available. You should consider upgrading via the ‘pip install --upgrade pip’ command. (app-root) bash-4.2# (app-root) bash-4.2#