What is this Error about?

ZConfig.SchemaResourceError: could not load package ZServer: No module named interfaces

everything was working fine. suddenly this error started occurring. what could be the reason?

Provide the full traceback please and explain in which context the error occurs.

http://docs.plone.org/manage/upgrading/troubleshooting.html

-aj

It happens when i try to restart the buildout or the plonectl.it was working fine, i was working in my theme but all of a sudden i dont know what happened, when i restarted buildout and Plonectl the following lines appeared.Please see below

[root@mail zeocluster]# ./bin/client1 fg Traceback (most recent call last): File "./bin/client1", line 256, in <module> + sys.argv[1:])) File "/opt/plone/buildout-cache/eggs/plone.recipe.zope2instance-4.2.17-py2.7.egg/plone/recipe/zope2instance/ctl.py", line 576, in main options.realize(args, doc=__doc__) File "/opt/plone/buildout-cache/eggs/Zope2-2.13.22-py2.7.egg/Zope2/Startup/zopectl.py", line 158, in realize ZDOptions.realize(self, *args, **kw) File "/opt/plone/buildout-cache/eggs/zdaemon-2.0.7-py2.7.egg/zdaemon/zdoptions.py", line 290, in realize self.load_schema() File "/opt/plone/buildout-cache/eggs/zdaemon-2.0.7-py2.7.egg/zdaemon/zdoptions.py", line 338, in load_schema self.schema = ZConfig.loadSchema(self.schemafile) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/loader.py", line 33, in loadSchema return SchemaLoader().loadURL(url) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/loader.py", line 67, in loadURL return self.loadResource(r) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/loader.py", line 195, in loadResource schema = ZConfig.schema.parseResource(resource, self) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/schema.py", line 27, in parseResource xml.sax.parse(resource.file, parser) File "/usr/local/lib/python2.7/xml/sax/__init__.py", line 33, in parse parser.parse(source) File "/usr/local/lib/python2.7/xml/sax/expatreader.py", line 107, in parse xmlreader.IncrementalParser.parse(self, source) File "/usr/local/lib/python2.7/xml/sax/xmlreader.py", line 123, in parse self.feed(buffer) File "/usr/local/lib/python2.7/xml/sax/expatreader.py", line 210, in feed self._parser.Parse(data, isFinal) File "/usr/local/lib/python2.7/xml/sax/expatreader.py", line 304, in start_element self._cont_handler.startElement(name, AttributesImpl(attrs)) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/schema.py", line 103, in startElement getattr(self, "start_" + name)(attrs) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/schema.py", line 306, in start_import src = self._loader.schemaComponentSource(pkg, file) File "/opt/plone/buildout-cache/eggs/ZConfig-2.9.1-py2.7.egg/ZConfig/loader.py", line 217, in schemaComponentSource package=package) ZConfig.SchemaResourceError: could not load package ZServer: No module named interfaces Package name: 'ZServer' File name: 'component.xml' Package path: None

Did you manage to solve this?

Errors such as this, usually mean a package was updated and a component no longer exists. I would look at the last lower version of the offending package/s in my cache and pin them to those versions.