Hi, I am receiving this traceback when I do restart Apache and not sure what to make of it: Exception in thread WorkflowRequestMonitor.monitor_thread: Traceback (most recent call last): File "/broad/software/free/Linux/redhat_6_x86_64/pkgs/python_2.7.1-sqlite3-rtrees/lib/python2.7/threading.py", line 530, in __bootstrap_inner self.run() File "/broad/software/free/Linux/redhat_6_x86_64/pkgs/python_2.7.1-sqlite3-rtrees/lib/python2.7/threading.py", line 483, in run self.__target(*self.__args, **self.__kwargs) File "/seq/regev_genome_portal/SOFTWARE/galaxy/lib/galaxy/workflow/scheduling_manager.py", line 158, in __monitor self.__schedule( workflow_scheduler_id, workflow_scheduler ) File "/seq/regev_genome_portal/SOFTWARE/galaxy/lib/galaxy/workflow/scheduling_manager.py", line 162, in __schedule invocation_ids = self.__active_invocation_ids( workflow_scheduler_id ) File "/seq/regev_genome_portal/SOFTWARE/galaxy/lib/galaxy/workflow/scheduling_manager.py", line 191, in __active_invocation_ids handler=handler, File "/seq/regev_genome_portal/SOFTWARE/galaxy/lib/galaxy/model/__init__.py", line 3254, in poll_active_workflow_ids WorkflowInvocation File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/scoping.py", line 150, in do return getattr(self.registry(), name)(*args, **kwargs) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/session.py", line 1165, in query return self._query_cls(entities, self, **kwargs) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/query.py", line 108, in __init__ self._set_entities(entities) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/query.py", line 118, in _set_entities self._set_entity_selectables(self._entities) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/query.py", line 151, in _set_entity_selectables ent.setup_entity(*d[entity]) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/query.py", line 3036, in setup_entity self._with_polymorphic = ext_info.with_polymorphic_mappers File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/util/langhelpers.py", line 725, in __get__ obj.__dict__[self.__name__] = result = self.fget(obj) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/mapper.py", line 1877, in _with_polymorphic_mappers configure_mappers() File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/mapper.py", line 2589, in configure_mappers mapper._post_configure_properties() File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/mapper.py", line 1694, in _post_configure_properties prop.init() File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/interfaces.py", line 144, in init self.do_init() File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/relationships.py", line 1549, in do_init self._process_dependent_arguments() File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/relationships.py", line 1605, in _process_dependent_arguments self.target = self.mapper.mapped_table File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/util/langhelpers.py", line 725, in __get__ obj.__dict__[self.__name__] = result = self.fget(obj) File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/orm/relationships.py", line 1522, in mapper argument = self.argument() File "/seq/regev_genome_portal/SOFTWARE/galaxy/eggs/SQLAlchemy-0.9.8-py2.7-linux-x86_64-ucs2.egg/sqlalchemy/ext/declarative/clsregistry.py", line 283, in __call__ (self.prop.parent, self.arg, n.args[0], self.cls) InvalidRequestError: When initializing mapper Mapper|Queue|kombu_queue, expression 'Message' failed to locate a name ("name 'Message' is not defined"). If this is a class name, consider adding this relationship() to the <class 'kombu.transport.sqlalchemy.Queue'> class after both dependent classes have been defined. This happens sometimes but when I shut down galaxy and re-start I don't get it anymore. Can someone guide me to a more permanent solution to this? Asma