UnicodeDecodeError on journalctl log

[chiara-paci]

When django raise a 500 error (f.e. following a ValueError), instead of exception stacktrace on journalctl log there is an UnicodeDecodeError.

Environment: Debian 10.12, Python 3.7.3, Django 3.2.5, Daphne 3.0.2, Apache 2.4.38

Systemd Unit File:

[Unit]
Description=baskerville Daphne Service
Requires=srv.mount
After=network.target 
After=srv.mount
 
[Service]
Type=simple 
User=chiara
WorkingDirectory=/srv/projects/baskerville.mygor.xyz/baskervilleweb
ExecStart=daphne --access-log /var/log/daphne/daphne-baskerville.log -b 127.0.0.1 -p 9000 baskervilleweb.asgi:application  Environment=PYTHONUNBUFFERED=1
   
[Install]
WantedBy=multi-user.target

Sample output

In a queryset, I define an annotation with the same name as a field:

class FoodDiaryEntryManager(models.Manager):
    def get_queryset(self):
        qset=models.Manager.get_queryset(self)
        return qset.annotate(
            qta=models.F("quantity")*models.F("measure_unit__factor"),
            ratio=models.F("quantity")*models.F("measure_unit__factor")/100
        ).annotate(
             kcal=models.F("ratio")*models.F("product__kcal")
        )

class FoodDiaryEntry(models.Model):
    ...
    product = models.ForeignKey(Product,on_delete=models.PROTECT)
    measure_unit = models.ForeignKey(MeasureUnit,on_delete=models.PROTECT)
    quantity = models.FloatField(validators=[validators.MinValueValidator(0.0)])
    ...
    kcal          = models.FloatField(editable=False)
    ...
    objects = FoodDiaryEntryManager()

The expected behaviour on journalctl log is an exception stacktrace with something like (from django console):

Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python3.7/dist-packages/django/db/models/query.py", line 1091, in annotate
    return self._annotate(args, kwargs, select=True)
  File "/usr/local/lib/python3.7/dist-packages/django/db/models/query.py", line 1126, in _annotate
    "the model." % alias)
ValueError: The annotation 'kcal' conflicts with a field on the model.

Instead I have:

# journalctl -f -u daphne-baskerville.service
...
Jul 19 10:47:24 parsifal daphne[26088]: --- Logging error ---
Jul 19 10:47:24 parsifal daphne[26088]: Traceback (most recent call last):
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/logging/__init__.py", line 1034, in emit
Jul 19 10:47:24 parsifal daphne[26088]:     msg = self.format(record)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/logging/__init__.py", line 880, in format
Jul 19 10:47:24 parsifal daphne[26088]:     return fmt.format(record)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/logging/__init__.py", line 627, in format
Jul 19 10:47:24 parsifal daphne[26088]:     record.exc_text = self.formatException(record.exc_info)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/logging/__init__.py", line 577, in formatException
Jul 19 10:47:24 parsifal daphne[26088]:     traceback.print_exception(ei[0], ei[1], tb, None, sio)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 104, in print_exception
Jul 19 10:47:24 parsifal daphne[26088]:     type(value), value, tb, limit=limit).format(chain=chain):
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 521, in __init__
Jul 19 10:47:24 parsifal daphne[26088]:     self._load_lines()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 533, in _load_lines
Jul 19 10:47:24 parsifal daphne[26088]:     self.__context__._load_lines()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 533, in _load_lines
Jul 19 10:47:24 parsifal daphne[26088]:     self.__context__._load_lines()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 533, in _load_lines
Jul 19 10:47:24 parsifal daphne[26088]:     self.__context__._load_lines()
Jul 19 10:47:24 parsifal daphne[26088]:   [Previous line repeated 5 more times]
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 531, in _load_lines
Jul 19 10:47:24 parsifal daphne[26088]:     frame.line
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/traceback.py", line 285, in line
Jul 19 10:47:24 parsifal daphne[26088]:     self._line = linecache.getline(self.filename, self.lineno).strip()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/linecache.py", line 16, in getline
Jul 19 10:47:24 parsifal daphne[26088]:     lines = getlines(filename, module_globals)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/linecache.py", line 47, in getlines
Jul 19 10:47:24 parsifal daphne[26088]:     return updatecache(filename, module_globals)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/linecache.py", line 137, in updatecache
Jul 19 10:47:24 parsifal daphne[26088]:     lines = fp.readlines()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/codecs.py", line 322, in decode
Jul 19 10:47:24 parsifal daphne[26088]:     (result, consumed) = self._buffer_decode(data, self.errors, final)
Jul 19 10:47:24 parsifal daphne[26088]: UnicodeDecodeError: 'utf-8' codec can't decode byte 0xd7 in position 4907: invalid continuation byte
Jul 19 10:47:24 parsifal daphne[26088]: Call stack:
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/bin/daphne", line 8, in <module>
Jul 19 10:47:24 parsifal daphne[26088]:     sys.exit(CommandLineInterface.entrypoint())
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/daphne/cli.py", line 170, in entrypoint
Jul 19 10:47:24 parsifal daphne[26088]:     cls().run(sys.argv[1:])
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/daphne/cli.py", line 285, in run
Jul 19 10:47:24 parsifal daphne[26088]:     self.server.run()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/daphne/server.py", line 143, in run
Jul 19 10:47:24 parsifal daphne[26088]:     reactor.run(installSignalHandlers=self.signal_handlers)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/twisted/internet/asyncioreactor.py", line 255, in run
Jul 19 10:47:24 parsifal daphne[26088]:     self._asyncioEventloop.run_forever()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/asyncio/base_events.py", line 539, in run_forever
Jul 19 10:47:24 parsifal daphne[26088]:     self._run_once()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/asyncio/base_events.py", line 1775, in _run_once
Jul 19 10:47:24 parsifal daphne[26088]:     handle._run()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/lib/python3.7/asyncio/events.py", line 88, in _run
Jul 19 10:47:24 parsifal daphne[26088]:     self._context.run(self._callback, *self._args)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/twisted/internet/asyncioreactor.py", line 271, in _onTimer
Jul 19 10:47:24 parsifal daphne[26088]:     self.runUntilCurrent()
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/twisted/internet/base.py", line 991, in runUntilCurrent
Jul 19 10:47:24 parsifal daphne[26088]:     call.func(*call.args, **call.kw)
Jul 19 10:47:24 parsifal daphne[26088]:   File "/usr/local/lib/python3.7/dist-packages/daphne/server.py", line 293, in application_checker
Jul 19 10:47:24 parsifal daphne[26088]:     exc_info=exception,
Jul 19 10:47:24 parsifal daphne[26088]: Message: 'Exception inside application: %s'
Jul 19 10:47:24 parsifal daphne[26088]: Arguments: (UnicodeDecodeError('utf-8', b'from django.db import models\nfrom django.core import validators\nfrom django.core.exceptions import ValidationError\nfrom django.utils import timezone\nfrom django.conf import settings\n\nimport datetime\n\nUser=settings.AUTH_USER_MODEL\n\n# Create your models here.\n\nclass AbstractName(models.Model):\n    name = models.CharField(max_length=1024)\n\n    def __str__(self): return str(self.name)\n\n    class Meta:\n        ordering = [ \'name\' ]\n        abstract = True\n\nclass Vendor(AbstractName): pass\nclass MicroNutrientClass(AbstractName): pass\n\nclass MicroNutrient(AbstractName):\n    nutrient_class = models.ForeignKey(MicroNutrientClass,on_delete=models.PROTECT)\n    rda = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                            verbose_name=\'rda (mg)\',default=0.0)\n    rda_max = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                                verbose_name=\'rda max (mg)\',default=0.0)\n\nclass ProductCategory(AbstractName): pass\n    \nclass Product(models.Model):\n    name = models.CharField(max_length=1024)\n    note = models.TextField(blank=True,null=True)\n    category = models.ForeignKey(ProductCategory,on_delete=models.PROTECT)\n    vendor = models.ForeignKey(Vendor,on_delete=models.PROTECT)\n    value_for = models.CharField(max_length=128,default=\'100 g\',\n                                 choices = ( ( "100 g", "100 g" ),\n                                             ( "100 ml", "100 ml" ) ))\n    high_processed = models.BooleanField(default=False)\n    kcal           = models.PositiveIntegerField()\n    fat            = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    saturated_fat  = models.FloatField(validators=[validators.MinValueValidator(0.0)],blank=True,default=0.0)\n    carbohydrate   = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    sugar          = models.FloatField(validators=[validators.MinValueValidator(0.0)],blank=True,default=0.0)\n    added_sugar    = models.FloatField(validators=[validators.MinValueValidator(0.0)],blank=True,default=0.0)\n    protein        = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    alcohol         = models.FloatField(validators=[validators.MinValueValidator(0.0)],blank=True,default=0.0)\n    alcohol_content = models.FloatField(validators=[validators.MinValueValidator(0.0),\n                                                    validators.MaxValueValidator(100.0)],\n                                        verbose_name="alcohol content (%)",\n                                        blank=True,default=0.0)\n    salt           = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                                       verbose_name="salt (g)",blank=True,default=0.0)\n    sodium         = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                                       verbose_name="sodium (g)",blank=True,default=0.0)\n    potassium      = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                                       verbose_name="potassium (g)",blank=True,default=0.0)\n    fiber          = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                                       verbose_name="fiber (g)",blank=True,default=0.0)\n    water          = models.FloatField(validators=[validators.MinValueValidator(0.0)],\n                                       verbose_name="water (ml)",blank=True,default=0.0)\n\n    micro_nutrients = models.ManyToManyField(MicroNutrient,through=\'ProductMicroNutrient\',blank=True)\n\n    class Meta:\n        ordering = [ \'name\',\'vendor\' ]\n\n    def save(self,*args,**kwargs):\n        if self.salt == 0 and self.sodium > 0:\n            self.salt=self.sodium/0.4\n        if self.sodium == 0 and self.salt > 0:\n            self.sodium=self.salt*0.4\n        if self.alcohol == 0 and self.alcohol_content > 0:\n            WATER_DENS=1\n            ALCOHOL_DENS=0.79\n            alcohol_factor=self.alcohol_content/100\n\n            if self.value_for == "100 ml":\n                tot_vol=100\n            else:\n                tot_dens=( (1-alcohol_factor)*WATER_DENS + alcohol_factor*ALCOHOL_DENS )\n                tot_vol=100/tot_dens\n            alcohol_vol=alcohol_factor*tot_vol\n            self.alcohol=ALCOHOL_DENS*alcohol_vol\n                \n        super(Product, self).save(*args,**kwargs)\n\n    def __str__(self): \n        return "%s (%s)" %(str(self.name),str(self.vendor))\n\nclass ProductMicroNutrient(models.Model):\n    product = models.ForeignKey(Product,on_delete=models.PROTECT)   \n    micro_nutrient = models.ForeignKey(MicroNutrient,on_delete=models.PROTECT)\n    quantity = models.FloatField(validators=[validators.MinValueValidator(0.0)],verbose_name=\'quantity (mg)\')\n\n    def __str__(self): return str(self.micro_nutrient)\n    \nclass MeasureUnit(AbstractName):\n    base = models.CharField(max_length=128,default=\'g\',choices = ( ( "g", "g" ),\n                                                                   ( "ml", "ml" ) ))\n    factor = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n\nclass FoodDiaryEntryManager(models.Manager):\n    def get_queryset(self):\n        qset=models.Manager.get_queryset(self)\n        return qset.annotate(\n            qta=models.F("quantity")*models.F("measure_unit__factor"),\n            ratio=models.F("quantity")*models.F("measure_unit__factor")/100\n        ).annotate(\n             kcal=models.F("ratio")*models.F("product__kcal")\n        )\n\nclass FoodDiaryEntry(models.Model):\n    user = models.ForeignKey(User,on_delete=models.PROTECT)\n    time = models.DateTimeField(default=timezone.now)\n    product = models.ForeignKey(Product,on_delete=models.PROTECT)\n    measure_unit = models.ForeignKey(MeasureUnit,on_delete=models.PROTECT)\n    quantity = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    future = models.BooleanField(default=False)\n\n    objects=FoodDiaryEntryManager()\n\n    kcal          = models.FloatField(editable=False)\n    fat           = models.FloatField(editable=False)\n    saturated_fat = models.FloatField(editable=False)\n    carbohydrate  = models.FloatField(editable=False)\n    sugar         = models.FloatField(editable=False)\n    protein       = models.FloatField(editable=False)\n    alcohol       = models.FloatField(editable=False)\n    added_sugar   = models.FloatField(editable=False)\n    salt          = models.FloatField(editable=False)\n    sodium        = models.FloatField(editable=False)\n    potassium     = models.FloatField(editable=False)\n    fiber         = models.FloatField(editable=False)\n    water         = models.FloatField(editable=False)\n\n\n    def __str__(self): return str(self.product)\n\n    class Meta:\n        ordering = [ \'time\' ]\n\n    def save(self,*args,**kwargs):\n        self.kcal=self._kcal()\n        self.fat=self._fat()\n        self.carbohydrate=self._carbohydrate()\n        self.sugar=self._sugar()\n        self.protein=self._protein()\n        self.added_sugar=self._added_sugar()\n        self.alcohol=self._alcohol()\n        self.saturated_fat=self._saturated_fat()\n        self.salt=self._salt()\n        self.sodium=self._sodium()\n        self.potassium=self._potassium()\n        self.fiber=self._fiber()\n        self.water=self._water()\n        super(FoodDiaryEntry,self).save(*args,**kwargs)\n\n    def quantity_real(self):\n        return self.quantity*self.measure_unit.factor\n\n    def measure_unit_real(self):\n        return self.measure_unit.base\n\n    def _kcal(self): return self.product.kcal*self.quantity_real()/100.0\n    def _fat(self): return self.product.fat*self.quantity_real()/100.0\n    def _alcohol(self): return self.product.alcohol*self.quantity_real()/100.0\n    def _carbohydrate(self): return self.product.carbohydrate*self.quantity_real()/100.0\n    def _sugar(self): return self.product.sugar*self.quantity_real()/100.0\n    def _added_sugar(self): return self.product.added_sugar*self.quantity_real()/100.0\n    def _protein(self): return self.product.protein*self.quantity_real()/100.0\n    def _saturated_fat(self): return self.product.saturated_fat*self.quantity_real()/100.0\n    def _salt(self): return self.product.salt*self.quantity_real()/100.0\n    def _sodium(self): return self.product.sodium*self.quantity_real()/100.0\n    def _potassium(self): return self.product.potassium*self.quantity_real()/100.0\n    def _fiber(self): return self.product.fiber*self.quantity_real()/100.0\n    def _water(self): return self.product.water*self.quantity_real()/100.0\n\nclass WeightDiaryEntry(models.Model):\n    user = models.ForeignKey(User,on_delete=models.PROTECT)\n    time = models.DateTimeField(default=timezone.now)\n    weight = models.FloatField(validators=[validators.MinValueValidator(0.0)],verbose_name=\'weight (kg)\')\n    base = models.FloatField(editable=False)\n    need = models.FloatField(editable=False)\n\n    ## QUI\n    def save(self,*args,**kwargs):\n        # https://en.wikipedia.org/wiki/Harris%E2%80%93Benedict_equation\n        # Men \tBMR = (10 \xd7 weight in kg) + (6.25 \xd7 height in cm) - (5 \xd7 age in years) + 5\n        # Women BMR = (10 \xd7 weight in kg) + (6.25 \xd7 height in cm) - (5 \xd7 age in years) - 161 \n        self.need=2000\n        self.base=1000\n        #age=self.time-self.user.date_of_birth\n        year=self.time.year-self.user.date_of_birth.year\n        #age=self.time - datetime.datetime.combine(self.user.date_of_birth, datetime.time())\n        #year=age.days/365.0\n\n        print("SAVE",year)\n\n        base=(10*self.weight) + (6.25*self.user.height) - (5*year)\n        if self.user.gender=="male":\n            base+=5\n        else:\n            base-=161\n\n        self.base=base\n\n        print("SAVE",base)\n\n            \n        # self.base=base\n\n        if self.user.lifestyle=="sedentary":\n            need=1.53*base\n        elif self.user.lifestyle=="active":\n            need=1.76*base\n        else:\n            need=2.25*base\n\n        self.need=need\n        # print("SAVE",base,need)\n\n        super(WeightDiaryEntry,self).save(*args,**kwargs)\n\nclass Restaurant(AbstractName):  pass\n\nclass RestaurantDishQuerySet(models.QuerySet):\n    def with_kcal(self):\n        prods=RestaurantDishProduct.objects.filter(dish=models.OuterRef("pk")).values("dish")\n        total_prods=prods.annotate(total=models.Sum("kcal")).values("total")\n        return self.annotate(kcal=models.Subquery(total_prods))\n\nclass RestaurantDishManager(models.Manager):\n    def get_queryset(self):\n        qset=models.Manager.get_queryset(self)\n        prods=RestaurantDishProduct.objects.filter(dish=models.OuterRef("pk")).values("dish")\n        total_prods=prods.annotate(total=models.Sum("kcal")).values("total")\n        return qset.annotate(kcal=models.Subquery(total_prods))\n\nclass RestaurantDish(AbstractName):\n    restaurant = models.ForeignKey(Restaurant,on_delete=models.PROTECT)\n\n    objects=RestaurantDishManager.from_queryset(RestaurantDishQuerySet)()\n    \n    def __str__(self): \n        return "%s (%s)" %(str(self.name),str(self.restaurant))\n\n# class RestaurantDishProductQuerySet(models.QuerySet):\n#     def with_ratio(self):\n#         return self.annotate(\n#             qta=models.F("quantity")*models.F("measure_unit__factor"),\n#             ratio=models.F("quantity")*models.F("measure_unit__factor")/100\n#         )\n\n#     def with_kcal(self):\n#         return self.annotate(\n#             kcal=models.F("ratio")*models.F("product__kcal")\n#         )\n\nclass RestaurantDishProductManager(models.Manager):\n    def get_queryset(self):\n        qset=models.Manager.get_queryset(self)\n        return qset.annotate(\n            qta=models.F("quantity")*models.F("measure_unit__factor"),\n            ratio=models.F("quantity")*models.F("measure_unit__factor")/100\n        ).annotate(\n            kcal=models.F("ratio")*models.F("product__kcal")\n        )\n\nclass RestaurantDishProduct(models.Model):\n    dish = models.ForeignKey(RestaurantDish,on_delete=models.PROTECT)\n    product = models.ForeignKey(Product,on_delete=models.PROTECT)\n    measure_unit = models.ForeignKey(MeasureUnit,on_delete=models.PROTECT)\n    quantity = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n\n    objects=RestaurantDishProductManager() #.from_queryset(RestaurantDishProductQuerySet)()\n\n\n    def __str__(self): return str(self.product)\n\n    def quantity_real(self):\n        return self.quantity*self.measure_unit.factor\n\nclass RecipeQuerySet(models.QuerySet):\n    def with_kcal(self):\n        prods=RecipeProduct.objects.filter(recipe=models.OuterRef("pk")).values("recipe")\n        total_prods=prods.annotate(total=models.Sum("kcal")).values("total")\n        return self.annotate(kcal=models.Subquery(total_prods))\n\nclass RecipeManager(models.Manager):\n    def get_queryset(self):\n        qset=models.Manager.get_queryset(self)\n        prods=RecipeProduct.objects.filter(recipe=models.OuterRef("pk")).values("recipe")\n        total_prods=prods.annotate(total=models.Sum("kcal")).values("total")\n        return qset.annotate(kcal=models.Subquery(total_prods))\n\n\nclass Recipe(AbstractName):\n    time = models.DateTimeField(default=timezone.now)\n    final_weight = models.PositiveIntegerField(default=0)\n    total_weight = models.PositiveIntegerField(editable=False)\n\n    objects=RecipeManager.from_queryset(RecipeQuerySet)()\n\n    class Meta:\n        ordering = [ "-time" ]\n    \n    def _total_weight(self):\n        total=0\n        for rp in self.recipeproduct_set.all():\n            total+=rp.quantity_real()\n        return total\n\n    def save(self,*args,**kwargs):\n        self.total_weight=self._total_weight()\n        if self.final_weight==0:\n            self.final_weight=self.total_weight\n        super(Recipe,self).save(*args,**kwargs)\n\nclass RecipeProductManager(models.Manager):\n    def get_queryset(self):\n        qset=models.Manager.get_queryset(self)\n        return qset.annotate(\n            qta=models.F("quantity")*models.F("measure_unit__factor"),\n            ratio=models.F("quantity")*models.F("measure_unit__factor")/100\n        ).annotate(\n            kcal=models.F("ratio")*models.F("product__kcal")\n        )\n\n\nclass RecipeProduct(models.Model):\n    recipe = models.ForeignKey(Recipe,on_delete=models.PROTECT)\n    product = models.ForeignKey(Product,on_delete=models.PROTECT)\n    measure_unit = models.ForeignKey(MeasureUnit,on_delete=models.PROTECT)\n    quantity = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n\n    objects=RecipeProductManager()\n\n    def __str__(self): return str(self.product)\n\n    def quantity_real(self):\n        return self.quantity*self.measure_unit.factor\n\nclass FrequentDiaryEntry(models.Model):\n    product = models.ForeignKey(Product,on_delete=models.PROTECT)\n    measure_unit = models.ForeignKey(MeasureUnit,on_delete=models.PROTECT)\n    quantity = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n\n    def __str__(self): return str(self.product)+" ("+str(self.quantity)+" "+str(self.measure_unit)+")"\n\n\n#####\n\n\nclass UsdaNndFoodGroup(AbstractName):\n    usda_id = models.CharField(max_length=1024)\n    \nclass UsdaNndFood(models.Model):\n    usda_id = models.CharField(max_length=1024)\n    food_group = models.ForeignKey(UsdaNndFoodGroup,on_delete=models.PROTECT)\n    long_description = models.CharField(max_length=1024)\n    short_description = models.CharField(max_length=1024)\n    common_name = models.CharField(max_length=1024)\n    manufacturer_name = models.CharField(max_length=1024)\n    survey = models.BooleanField()\n    refuse_desc = models.CharField(max_length=1024)\n    refuse_perc = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    scientific_name = models.CharField(max_length=1024)\n    nitrogen_factor = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    protein_factor = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    fat_factor = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n    carbohydrate_factor = models.FloatField(validators=[validators.MinValueValidator(0.0)])\n\n    def __str__(self): return str(self.short_description)\n\nclass UsdaNndLangual(models.Model):\n    usda_id = models.CharField(max_length=1024)\n    description = models.CharField(max_length=1024)\n\n    def __str__(self): return str(self.description)\n\nclass UsdaNndFoodLangualRelation(models.Model):\n    food    = models.ForeignKey(UsdaNndFood,on_delete=models.PROTECT)\n    langual = models.ForeignKey(UsdaNndLangual,on_delete=models.PROTECT)\n    \n    def __str__(self): return str(self.langual.description)\n    \n', 9003, 9004, 'invalid continuation byte'),)

[carltongibson]

This may be related to #411...

It's hard to see what could be the issue here. Can you reduce it to a minimal runnable example?

[chiara-paci]

I suppose this can be triggered introducing a syntax error on a minimal "Hello World" asgi application and configuring a systemd service.