Here's the trace, and one of the email headers is Content-Type: text/plain; charset=ISO-8859-1; format=flowed and certainly there was some non-utf8 in the mail body.
Traceback (most recent call last):
File "/var/local/allura/Allura/allura/command/smtp_server.py", line 57, in process_message
peer=peer, mailfrom=mailfrom, rcpttos=rcpttos, data=data)
File "/var/local/allura/Allura/allura/lib/decorators.py", line 62, in post
return M.MonQTask.post(func, args, kwargs, delay=delay)
File "/var/local/allura/Allura/allura/model/monq_model.py", line 173, in post
session(obj).flush(obj)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/odm/base.py", line 29, in inner
result = func(obj, *args, **kwargs)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/odm/odmsession.py", line 59, in flush
self.insert_now(obj, st)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/odm/base.py", line 29, in inner
result = func(obj, *args, **kwargs)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/odm/odmsession.py", line 67, in insert_now
mapper(obj).insert(obj, st, self, **kwargs)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/odm/base.py", line 29, in inner
result = func(obj, *args, **kwargs)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/odm/mapper.py", line 55, in insert
session.impl.insert(doc, validate=False)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/session.py", line 22, in wrapper
return func(self, doc, *args, **kwargs)
File "/var/local/env-allura/lib/python2.7/site-packages/Ming-0.4.2-py2.7.egg/ming/session.py", line 160, in insert
bson = self._impl(doc).insert(data, safe=kwargs.get('safe', True))
File "/var/local/env-allura/lib/python2.7/site-packages/pymongo-2.4.2-py2.7-linux-x86_64.egg/pymongo/collection.py", line 359, in insert
continue_on_error, self.__uuid_subtype), safe)
InvalidStringData: ('strings in documents must be valid UTF-8', 'doc:
allura:tv/7096
To repro on master (tail allura.log to see error):
Apply fix, restart smtp_server, rerun swaks command.