Django 1.6 w/ gunicorn - OperationalError: (2006, 'MySQL server has gone away')
Django 1.6 w/ gunicorn - OperationalError: (2006, 'MySQL server has gone away')
在升级到 Django 1.6 的过程中，我开始频繁收到 OperationalError: (2006, 'MySQL server has gone away') 消息，请求我使用 运行 Django 应用程序的 gunicorn 服务器。这些错误从服务器启动的那一刻起立即发生，请求只需要一秒钟，这让我怀疑这是一个超时问题。该错误在项目的旧 1.4 分支上不存在，如果仅通过 django-admin.py runserver.
提供服务，则 1.6 分支不会以这种方式运行
我通常通过 sv 进程 运行 gunicorn（尽管如果我也手动 运行 它会出错）使用命令 django-admin.py run_gunicorn --workers=4 -b localhost:8000 这会导致许多请求，甚至是静态请求媒体，返回：
[ERROR] 2015-07-29 14:30:27,931 - gunicorn.error:260 - Error handling request
Traceback (most recent call last):
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 125, in handle_request
respiter = self.wsgi(environ, resp.start_response)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 187, in __call__
self.load_middleware()
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 47, in load_middleware
mw_instance = mw_class()
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/middleware/locale.py", line 24, in __init__
for url_pattern in get_resolver(None).url_patterns:
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 365, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 360, in urlconf_module
self._urlconf_module = import_module(self.urlconf_name)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/opt/apps/maplecroft/versions/current/websites/maplecroft/urls.py", line 2, in <module>
from maplecroft.views import RiskAtlasesLandingView
File "/opt/apps/maplecroft/versions/current/maplecroft/views.py", line 40, in <module>
import maplecroft.search as _search
File "/opt/apps/maplecroft/versions/current/maplecroft/search.py", line 71, in <module>
class MaplecroftSearchForm(SearchForm):
File "/opt/apps/maplecroft/versions/current/maplecroft/search.py", line 111, in MaplecroftSearchForm
choices=model_choices(),
File "/opt/apps/maplecroft/versions/current/maplecroft/search.py", line 57, in model_choices
for category in reversed(Category.objects.filter(parent=None)):
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/query.py", line 77, in __len__
self._fetch_all()
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/query.py", line 857, in _fetch_all
self._result_cache = list(self.iterator())
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/query.py", line 220, in iterator
for row in compiler.results_iter():
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 713, in results_iter
for rows in self.execute_sql(MULTI):
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 786, in execute_sql
cursor.execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/util.py", line 69, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/utils.py", line 99, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 124, in execute
return self.cursor.execute(query, args)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/MySQLdb/cursors.py", line 174, in execute
self.errorhandler(self, exc, value)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
OperationalError: (2006, 'MySQL server has gone away')
但是，如果我下降到 --workers=1，一切似乎 运行 都很顺利，所以我目前的想法是，这是 gunicorn 的线程工作者功能的问题吗？
编辑：我刚刚尝试将 gunicorn 升级到最新版本（在 0.17.2 上），但这似乎没有什么不同。
我想知道这个问题：https://serverfault.com/questions/407612/error-2006-mysql-server-has-gone-away 是否相关，但很难用我当前的问题来覆盖它
看来毕竟是gunicorn版本-我尝试升级gunicorn但仍然使用django-admin.py run_gunicorn启动服务器的方法。升级 gunicorn 并切换到未弃用的 gunicorn wsgi:application 方法解决了它。
在升级到 Django 1.6 的过程中，我开始频繁收到 OperationalError: (2006, 'MySQL server has gone away') 消息，请求我使用 运行 Django 应用程序的 gunicorn 服务器。这些错误从服务器启动的那一刻起立即发生，请求只需要一秒钟，这让我怀疑这是一个超时问题。该错误在项目的旧 1.4 分支上不存在，如果仅通过 django-admin.py runserver.
我通常通过 sv 进程 运行 gunicorn（尽管如果我也手动 运行 它会出错）使用命令 django-admin.py run_gunicorn --workers=4 -b localhost:8000 这会导致许多请求，甚至是静态请求媒体，返回：
[ERROR] 2015-07-29 14:30:27,931 - gunicorn.error:260 - Error handling request
Traceback (most recent call last):
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/gunicorn/workers/sync.py", line 125, in handle_request
respiter = self.wsgi(environ, resp.start_response)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/handlers/wsgi.py", line 187, in __call__
self.load_middleware()
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/handlers/base.py", line 47, in load_middleware
mw_instance = mw_class()
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/middleware/locale.py", line 24, in __init__
for url_pattern in get_resolver(None).url_patterns:
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 365, in url_patterns
patterns = getattr(self.urlconf_module, "urlpatterns", self.urlconf_module)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/core/urlresolvers.py", line 360, in urlconf_module
self._urlconf_module = import_module(self.urlconf_name)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/utils/importlib.py", line 40, in import_module
__import__(name)
File "/opt/apps/maplecroft/versions/current/websites/maplecroft/urls.py", line 2, in <module>
from maplecroft.views import RiskAtlasesLandingView
File "/opt/apps/maplecroft/versions/current/maplecroft/views.py", line 40, in <module>
import maplecroft.search as _search
File "/opt/apps/maplecroft/versions/current/maplecroft/search.py", line 71, in <module>
class MaplecroftSearchForm(SearchForm):
File "/opt/apps/maplecroft/versions/current/maplecroft/search.py", line 111, in MaplecroftSearchForm
choices=model_choices(),
File "/opt/apps/maplecroft/versions/current/maplecroft/search.py", line 57, in model_choices
for category in reversed(Category.objects.filter(parent=None)):
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/query.py", line 77, in __len__
self._fetch_all()
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/query.py", line 857, in _fetch_all
self._result_cache = list(self.iterator())
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/query.py", line 220, in iterator
for row in compiler.results_iter():
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 713, in results_iter
for rows in self.execute_sql(MULTI):
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/models/sql/compiler.py", line 786, in execute_sql
cursor.execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/util.py", line 69, in execute
return super(CursorDebugWrapper, self).execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/utils.py", line 99, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/django/db/backends/mysql/base.py", line 124, in execute
return self.cursor.execute(query, args)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/MySQLdb/cursors.py", line 174, in execute
self.errorhandler(self, exc, value)
File "/opt/envs/maplecroft/local/lib/python2.7/site-packages/MySQLdb/connections.py", line 36, in defaulterrorhandler
raise errorclass, errorvalue
OperationalError: (2006, 'MySQL server has gone away')
但是，如果我下降到 --workers=1，一切似乎 运行 都很顺利，所以我目前的想法是，这是 gunicorn 的线程工作者功能的问题吗？
编辑：我刚刚尝试将 gunicorn 升级到最新版本（在 0.17.2 上），但这似乎没有什么不同。
我想知道这个问题：https://serverfault.com/questions/407612/error-2006-mysql-server-has-gone-away 是否相关，但很难用我当前的问题来覆盖它
看来毕竟是gunicorn版本-我尝试升级gunicorn但仍然使用django-admin.py run_gunicorn启动服务器的方法。升级 gunicorn 并切换到未弃用的 gunicorn wsgi:application 方法解决了它。