New submission from Osvaldo Santana Neto:
We're facing ocasional RuntimeError exceptions in a multithreaded application
when one of the threads creates new entries to the environment (os.environ).
I'm not so sure if the attached patch fixes this issue the right way, so, feel
free to propose another approach.
Traceback Sample of the issue in our production environment:
RuntimeError: dictionary changed size during iteration
File "python3.5/runpy.py", line 170, in _run_module_as_main
"__main__", mod_spec)
File "python3.5/runpy.py", line 85, in _run_code
exec(code, run_globals)
[ internal code ]
File "newrelic/api/background_task.py", line 103, in wrapper
return wrapped(*args, **kwargs)
File "python3.5/contextlib.py", line 30, in inner
return func(*args, **kwds)
File "python3.5/contextlib.py", line 77, in __exit__
self.gen.throw(type, value, traceback)
File "raven/base.py", line 851, in make_decorator
yield
File "python3.5/contextlib.py", line 30, in inner
return func(*args, **kwds)
[ internal code ]
File "retry/api.py", line 74, in retry_decorator
logger)
File "retry/api.py", line 33, in __retry_internal
return f()
[ internal code ]
File "requests/sessions.py", line 531, in get
return self.request('GET', url, **kwargs)
File "requests/sessions.py", line 509, in request
prep.url, proxies, stream, verify, cert
File "requests/sessions.py", line 686, in merge_environment_settings
env_proxies = get_environ_proxies(url, no_proxy=no_proxy)
File "requests/utils.py", line 696, in get_environ_proxies
return getproxies()
File "urllib/request.py", line 2393, in getproxies_environment
for name, value in os.environ.items():
File "_collections_abc.py", line 676, in __iter__
for key in self._mapping:
File "python3.5/os.py", line 702, in __iter__
for key in self._data:
----------
components: Library (Lib)
files: fix_os_environ_iteration_issue.diff
keywords: patch
messages: 294250
nosy: osantana
priority: normal
severity: normal
status: open
title: os.environ raises RuntimeError: dictionary changed size during iteration
type: behavior
versions: Python 3.5, Python 3.6
Added file: http://bugs.python.org/file46889/fix_os_environ_iteration_issue.diff
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Python tracker <rep...@bugs.python.org>
<http://bugs.python.org/issue30441>
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