#19775 `BuildConfigurationError` when using native client with pantsd of different version (e.g. upgrading from 2.16 to 2.17) Issue created by danxmoran Describe the bug After switching from my

main

branch (running 2.16) to a branch where I'm testing 2.17, running any

pants

goal fails with:

14:42:04.32 [ERROR] 1 Exception encountered:

Engine traceback:
  in select
    ..
  in pants.core.util_rules.environments.determine_local_environment
    ..
  in pants.core.util_rules.environments.determine_all_environments
    ..
  in construct_scope_environments_preview
    ..

Traceback (most recent call last):
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/selectors.py", line 623, in native_engine_generator_send
    res = rule.send(arg) if err is None else rule.throw(throw or err)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/option/subsystem.py", line 311, in _construct_subsytem
    scoped_options = await Get(ScopedOptions, Scope(str(subsystem_typ.options_scope)))
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/selectors.py", line 118, in __await__
    result = yield self
pants.base.exceptions.BuildConfigurationError: Version mismatch: Requested version was 2.17.0, our version is 2.16.0.

Traceback (most recent call last):
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/bin/daemon_pants_runner.py", line 130, in single_daemonized_run
    scheduler, options_initializer = self._core.prepare(options_bootstrapper, complete_env)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/pantsd/pants_daemon_core.py", line 130, in prepare
    build_config = self._options_initializer.build_config(options_bootstrapper, env)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/init/options_initializer.py", line 111, in build_config
    return _initialize_build_configuration(self._plugin_resolver, options_bootstrapper, env)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/init/options_initializer.py", line 48, in _initialize_build_configuration
    working_set = plugin_resolver.resolve(options_bootstrapper, env)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/init/plugin_resolver.py", line 139, in resolve
    for resolved_plugin_location in self._resolve_plugins(
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/init/plugin_resolver.py", line 163, in _resolve_plugins
    params = Params(request, determine_bootstrap_environment(session))
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/core/util_rules/environments.py", line 443, in determine_bootstrap_environment
    session.product_request(ChosenLocalEnvironmentName, [Params()])[0],
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 569, in product_request
    return self.execute(request)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 513, in execute
    self._raise_on_error([t for _, t in throws])
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/scheduler.py", line 497, in _raise_on_error
    raise ExecutionError(
pants.engine.internals.scheduler.ExecutionError: 1 Exception encountered:

Engine traceback:
  in select
    ..
  in pants.core.util_rules.environments.determine_local_environment
    ..
  in pants.core.util_rules.environments.determine_all_environments
    ..
  in construct_scope_environments_preview
    ..

Traceback (most recent call last):
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/selectors.py", line 623, in native_engine_generator_send
    res = rule.send(arg) if err is None else rule.throw(throw or err)
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/option/subsystem.py", line 311, in _construct_subsytem
    scoped_options = await Get(ScopedOptions, Scope(str(subsystem_typ.options_scope)))
  File "/Users/dan.moran/Library/Caches/nce/50b60c9f29c54578592fd2b4725722435f65d43cb21e6e2732268b6d5050a09a/bindings/venvs/2.16.0/lib/python3.9/site-packages/pants/engine/internals/selectors.py", line 118, in __await__
    result = yield self
pants.base.exceptions.BuildConfigurationError: Version mismatch: Requested version was 2.17.0, our version is 2.16.0.

Running

rm -rf .pids

to reboot pantsd fixes the error, but I don't remember this sort of problem when upgrading Pants in the past. Pants version 2.17.0 OS MacOS Additional info Rebooting pantsd in response to this error popped into my head because I know how pants works ~reasonably well, but a less-familiar user would probably have no clue what to do in this case. pantsbuild/pants