[英]_DeadlockError in Django while starting server
很多時候我在啟動python服務器時遇到此錯誤。 當我更改任何文件並且服務器再次啟動時,也會發生這種情況。
我嘗試刪除環境並重新創建環境,但是仍然存在相同的錯誤。
Linux上的Python 3.5.2(默認值,2018年11月12日,13:43:14)[GCC 5.4.0 20160609]
的Django:2.2.1
/home/satyam/Code/myproject/myproject_apps/invoice/services/excel_service.py changed, reloading.
Watching for file changes with StatReloader
Performing system checks...
Exception in thread django-main-thread:
Traceback (most recent call last):
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/utils.py", line 66, in __getitem__
return self._engines[alias]
KeyError: 'django'
During handling of the above exception, another exception occurred:
Traceback (most recent call last):
File "/usr/lib/python3.5/threading.py", line 914, in _bootstrap_inner
self.run()
File "/usr/lib/python3.5/threading.py", line 862, in run
self._target(*self._args, **self._kwargs)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/utils/autoreload.py", line 54, in wrapper
fn(*args, **kwargs)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/core/management/commands/runserver.py", line 117, in inner_run
self.check(display_num_errors=True)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/core/management/base.py", line 390, in check
include_deployment_checks=include_deployment_checks,
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/core/management/base.py", line 377, in _run_checks
return checks.run_checks(**kwargs)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/core/checks/registry.py", line 72, in run_checks
new_errors = check(app_configs=app_configs)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/contrib/admin/checks.py", line 79, in check_dependencies
for engine in engines.all():
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/utils.py", line 90, in all
return [self[alias] for alias in self]
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/utils.py", line 90, in <listcomp>
return [self[alias] for alias in self]
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/utils.py", line 81, in __getitem__
engine = engine_cls(params)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/backends/django.py", line 25, in __init__
options['libraries'] = self.get_templatetag_libraries(libraries)
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/backends/django.py", line 43, in get_templatetag_libraries
libraries = get_installed_libraries()
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/backends/django.py", line 108, in get_installed_libraries
for name in get_package_libraries(pkg):
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/template/backends/django.py", line 121, in get_package_libraries
module = import_module(entry[1])
File "/home/satyam/Code/environments/ebapps/lib/python3.5/importlib/__init__.py", line 126, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 986, in _gcd_import
File "<frozen importlib._bootstrap>", line 969, in _find_and_load
File "<frozen importlib._bootstrap>", line 958, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 673, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 665, in exec_module
File "<frozen importlib._bootstrap>", line 222, in _call_with_frames_removed
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/rest_framework/templatetags/rest_framework.py", line 15, in <module>
from rest_framework.renderers import HTMLFormRenderer
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/rest_framework/renderers.py", line 20, in <module>
from django.test.client import encode_multipart
File "/home/satyam/Code/environments/ebapps/lib/python3.5/site-packages/django/test/client.py", line 23, in <module>
from django.test import signals
File "<frozen importlib._bootstrap>", line 968, in _find_and_load
File "<frozen importlib._bootstrap>", line 168, in __enter__
File "<frozen importlib._bootstrap>", line 110, in acquire
_frozen_importlib._DeadlockError: deadlock detected by _ModuleLock('django.test.signals') at 140078699689688
您似乎陷入了僵局,因為從信號處理程序向同一模型發送信號。 或第二個處理程序等待一些資源從第一個解鎖。 行或表很可能在數據庫級別上被鎖定。
對我造成錯誤的是此導入:
from rest_framework.urlpatterns import format_suffix_patterns
刪除它立即解決了問題。
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