我正试图找到问题的根源，这导致我们的Zope实例以越来越规律的方式锁定。我已经安装了Products.signalstackLogger试图找到它的底部，当我们在Plone中定义的一个内容规则试图发送电子邮件时，它似乎正在发生。
例如：
Thread 46447504 (GET /VirtualHostBase/https/xxx.xxx.xxx:443/plone/VirtualHostRoot/news/portal_factory/News Item/news_item.2012-09-18.0763501726/edit):
File "/home/zope/home/parts/zope2/lib/python/ZServer/PubCore/ZServerPublisher.py", line 31, in __init__
response=b)
File "/home/zope/home/parts/zope2/lib/python/ZPublisher/Publish.py", line 401, in publish_module
environ, debug, request, response)
File "/home/zope/home/parts/zope2/lib/python/ZPublisher/Publish.py", line 202, in publish_module_standard
response = publish(request, module_name, after_list, debug=debug)
File "/home/zope/home/parts/zope2/lib/python/ZPublisher/Publish.py", line 119, in publish
request, bind=1)
File "/home/zope/home/parts/zope2/lib/python/ZPublisher/mapply.py", line 88, in mapply
if debug is not None: return debug(object,args,context)
File "/home/zope/home/parts/zope2/lib/python/ZPublisher/Publish.py", line 42, in call_object
result=apply(object,args) # Type s<cr> to step into published object.
File "/home/zope/home/eggs/Plone-3.3.6-py2.4.egg/Products/CMFPlone/FactoryTool.py", line 375, in __call__
temp_obj = tempFolder.__getitem__(id)
File "/home/zope/home/eggs/Plone-3.3.6-py2.4.egg/Products/CMFPlone/FactoryTool.py", line 155, in __getitem__
self.invokeFactory(id=id, type_name=type_name)
File "/home/zope/home/eggs/Plone-3.3.6-py2.4.egg/Products/CMFPlone/PloneFolder.py", line 348, in invokeFactory
new_id = pt.constructContent(*args, **kw)
File "/home/zope/home/eggs/Products.CMFCore-2.1.3-py2.4.egg/Products/CMFCore/TypesTool.py", line 716, in constructContent
ob = info.constructInstance(container, id, *args, **kw)
File "/home/zope/home/eggs/Products.CMFCore-2.1.3-py2.4.egg/Products/CMFCore/TypesTool.py", line 276, in constructInstance
ob = self._constructInstance(container, id, *args, **kw)
File "/home/zope/home/eggs/Products.CMFCore-2.1.3-py2.4.egg/Products/CMFCore/TypesTool.py", line 450, in _constructInstance
newid = m(id, *args, **kw)
File "<string>", line 7, in addATNewsItem
File "/home/zope/home/parts/zope2/lib/python/OFS/ObjectManager.py", line 349, in _setObject
notifyContainerModified(self)
File "/home/zope/home/parts/zope2/lib/python/zope/app/container/contained.py", line 365, in notifyContainerModified
notify(ContainerModifiedEvent(object, *descriptions))
File "/home/zope/home/parts/zope2/lib/python/zope/event/__init__.py", line 23, in notify
subscriber(event)
File "/home/zope/home/parts/zope2/lib/python/zope/component/event.py", line 26, in dispatch
for ignored in zope.component.subscribers(event, None):
File "/home/zope/home/parts/zope2/lib/python/zope/component/_api.py", line 130, in subscribers
return sitemanager.subscribers(objects, interface)
File "/home/zope/home/parts/zope2/lib/python/zope/component/registry.py", line 290, in subscribers
return self.adapters.subscribers(objects, provided)
File "/home/zope/home/parts/zope2/lib/python/zope/interface/adapter.py", line 535, in subscribers
subscription(*objects)
File "/home/zope/home/eggs/plone.app.contentrules-1.1.7-py2.4.egg/plone/app/contentrules/handlers.py", line 174, in modified
execute(aq_parent(aq_inner(event.object)), event)
File "/home/zope/home/eggs/plone.app.contentrules-1.1.7-py2.4.egg/plone/app/contentrules/handlers.py", line 97, in execute
executor(event, bubbled=True, rule_filter=rule_filter)
File "/home/zope/home/eggs/plone.contentrules-1.1.0-py2.4.egg/plone/contentrules/engine/executor.py", line 27, in __call__
executable()
File "/home/zope/home/eggs/plone.contentrules-1.1.0-py2.4.egg/plone/contentrules/rule/rule.py", line 48, in __call__
if not executable():
File "/home/zope/home/eggs/plone.app.contentrules-1.1.7-py2.4.egg/plone/app/contentrules/actions/mail.py", line 103, in __call__
From=source)
File "/home/zope/home/eggs/Products.SecureMailHost-1.1.2-py2.4.egg/Products/SecureMailHost/SecureMailHost.py", line 246, in secureSend
return self._send(mfrom, all_recipients, msg, debug=debug)
File "/home/zope/home/eggs/Products.SecureMailHost-1.1.2-py2.4.egg/Products/SecureMailHost/SecureMailHost.py", line 276, in _send
mail.send()
File "/home/zope/home/eggs/Products.SecureMailHost-1.1.2-py2.4.egg/Products/SecureMailHost/mail.py", line 102, in send
smtpserver = smtplib.SMTP(self.host, self.port)
File "/usr/local/lib/python2.4/smtplib.py", line 244, in __init__
(code, msg) = self.connect(host, port)
File "/usr/local/lib/python2.4/smtplib.py", line 311, in connect
(code, msg) = self.getreply()
File "/usr/local/lib/python2.4/smtplib.py", line 352, in getreply
line = self.file.readline()
File "/usr/local/lib/python2.4/socket.py", line 332, in readline
data = self._sock.recv(self._rbufsize)
这些通知通常无问题（每天发送许多电子邮件），并且已配置好12个月以上，问题仅在过去2个月内出现。解决问题的唯一主要变化是从Apache负载均衡器切换到Haproxy
我们正在使用：
答案 0 :(得分：1)
这似乎是我们的qmail服务器达到其外部连接限制的结果。我们已将此配置为30和一个IP（可能是一个spambot）占用了其中的20个。
我们的Zope实例通过qmail在同一个虚拟服务器上发送电子邮件，但这也是我们面向外部的邮件服务器。一旦达到连接限制，似乎来自smtplib的连接尝试将等待而没有超时。
目前我已经关闭了有问题的内容规则。从长远来看，我们可能patch ucspi-tcp通过IP限制连接，并切换到使用单独的邮件服务器进行本地和外部电子邮件。