weird memory error on Centos7

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Fernando González Cisneros

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Dec 5, 2019, 6:02:02 PM12/5/19
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Hello, having some trouble here.

I'm developing an app using the postgis backend in django, i'm releasing it using an apache server on Centos 7, i'm using mod_wsgi for python 3.6 and i've already published a test "hello world" app without trouble, however when i try to publish my app a 500 internal error, when i check the error log the next text appears:

mod_wsgi (pid=26812): Target WSGI script '/var/www/html/simulacros/simulacros/wsgi.py' cannot be loaded as Python module.
 mod_wsgi (pid=26812): Exception occurred processing WSGI script '/var/www/html/simulacros/simulacros/wsgi.py'.
 Traceback (most recent call last):
  File "/var/www/html/simulacros/simulacros/wsgi.py", line 16, in <module>
     application = get_wsgi_application()
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application
     django.setup(set_prefix=False)
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/__init__.py", line 24, in setup
    apps.populate(settings.INSTALLED_APPS)
   File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/apps/registry.py", line 114, in populate
    app_config.import_models()
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/apps/config.py", line 211, in import_models
    self.models_module = import_module(models_module_name)
   File "/opt/rh/rh-python36/root/usr/lib64/python3.6/importlib/__init__.py", line 126, in import_module
   return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 994, in _gcd_import
  File "<frozen importlib._bootstrap>", line 971, in _find_and_load
 File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
  File "<frozen importlib._bootstrap_external>", line 678, in exec_module
 File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
   File "/var/www/html/simulacros/proyecto/models.py", line 1, in <module>
    from django.contrib.gis.db import models
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/db/models/__init__.py", line 3, in <module>
    import django.contrib.gis.db.models.functions  # NOQA
 File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/db/models/functions.py", line 4, in <module>
     from django.contrib.gis.db.models.fields import BaseSpatialField, GeometryField
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/db/models/fields.py", line 3, in <module>
   from django.contrib.gis import forms, gdal
   File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/forms/__init__.py", line 3, in <module>
     from .fields import (  # NOQA
   File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/forms/fields.py", line 2, in <module>
     from django.contrib.gis.gdal import GDALException
 File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/gdal/__init__.py", line 28, in <module>
     from django.contrib.gis.gdal.datasource import DataSource
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/gdal/datasource.py", line 39, in <module>
    from django.contrib.gis.gdal.driver import Driver
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
     from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
 File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 9, in <module>
     from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
  File "/var/www/html/simulacros/app/lib64/python3.6/site-packages/django/contrib/gis/gdal/libgdal.py", line 113, in <module>
   err_handler = CPLErrorHandler(err_handler)
 MemoryError

I know "MemoryError" is self-explanatory however when i asked the system administrator if there was a memory problem he informed me there wasn't any. This leaves me wondering where can i be wrong.

In case someone asks here's my wsgi.conf file:


Alias /static /var/www/html/simulacros/static
<Directory /var/www/html/simulacros/static>
Options FollowSymLinks
AllowOverride None
Require all granted
</Directory>
WSGIDaemonProcess simulacros python-home=/var/www/html/simulacros/app python-path=/var/www/html/simulacros
WSGIProcessGroup simulacros
WSGIScriptAlias /simulacros /var/www/html/simulacros/simulacros/wsgi.py process-group=simulacros
<Directory /var/www/html/simulacros/simulacros>
<Files wsgi.py>
Require all granted
</Files>
</Directory>


Thanks for your attention!

DANIEL URBANO DE LA RUA

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Dec 5, 2019, 6:10:30 PM12/5/19
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Try installing apt-ger install binutils libproj-dev gdal-bin

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DANIEL URBANO DE LA RUA

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Dec 5, 2019, 6:10:57 PM12/5/19
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DANIEL URBANO DE LA RUA

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Dec 5, 2019, 6:14:21 PM12/5/19
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In your case use yum to get thoses package

On Fri, 6 Dec 2019, 00:12 DANIEL URBANO DE LA RUA, <dannybo...@gmail.com> wrote:
Try installing apt-ger install binutils libproj-dev gdal-bin

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Fernando González Cisneros

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Dec 5, 2019, 8:54:18 PM12/5/19
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thanks but i already did it, and the error is still there...i just have a question, does geodjango has support gdal 3.0?

To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAO_yRT01mgR5wzFsHH2iTBSm2qTV7DFJyp7qKXzjrG3Piz_fdQ%40mail.gmail.com.

Wouter

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Mar 27, 2020, 6:04:05 AM3/27/20
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I had the same issue yesterday with geodjango and this MemoryError and managed to find out it was caused by selinux. I wrote a custom selinux httpd policy, which took me a couple of iterations because after fixing one sealert I ran into the next.
If you are still looking for a solution and interested in mine, let me know.


On Friday, 6 December 2019 02:54:18 UTC+1, Fernando González Cisneros wrote:
thanks but i already did it, and the error is still there...i just have a question, does geodjango has support gdal 3.0?

El jue., 5 dic. 2019 a las 17:13, DANIEL URBANO DE LA RUA (<dannybo...@gmail.com>) escribió:
In your case use yum to get thoses package

On Fri, 6 Dec 2019, 00:12 DANIEL URBANO DE LA RUA, <dannybo...@gmail.com> wrote:
Try installing apt-ger install binutils libproj-dev gdal-bin

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Michael Johnson

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Feb 16, 2021, 1:56:39 PM2/16/21
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Hi Wouter,

I am having this same issue (or a very similar one - I am using Centos 8), and this is the only place I have seen someone else with it. Do you mind sharing your solution? I have the packages installed as suggested by DANIEL URBANO DE LA RUA, and I see on the docs that geodjango suports gdal3

Thanks in advance

mod_wsgi (pid=584037): Exception occurred processing WSGI script '/django/myapp/wsgi.py'.
Traceback (most recent call last):
   File "/django/myapp/wsgi.py", line 20, in <module>
     application = get_wsgi_application()
   File "/usr/local/lib/python3.6/site-packages/django/core/wsgi.py", line 12, in get_wsgi_application
     django.setup(set_prefix=False)
   File "/usr/local/lib/python3.6/site-packages/django/__init__.py", line 24, in setup
     apps.populate(settings.INSTALLED_APPS)
   File "/usr/local/lib/python3.6/site-packages/django/apps/registry.py", line 114, in populate
     app_config.import_models()
   File "/usr/local/lib/python3.6/site-packages/django/apps/config.py", line 211, in import_models
     self.models_module = import_module(models_module_name)
   File "/usr/lib64/python3.6/importlib/__init__.py", line 126, in import_module
     return _bootstrap._gcd_import(name[level:], package, level)
   File "<frozen importlib._bootstrap>", line 994, in _gcd_import
   File "<frozen importlib._bootstrap>", line 971, in _find_and_load
   File "<frozen importlib._bootstrap>", line 955, in _find_and_load_unlocked
   File "<frozen importlib._bootstrap>", line 665, in _load_unlocked
   File "<frozen importlib._bootstrap_external>", line 678, in exec_module
   File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
   File "/django/myapp/app/models.py", line 2, in <module>
     from django.contrib.auth.models import User
   File "/usr/local/lib/python3.6/site-packages/django/contrib/auth/models.py", line 2, in <module>
     from django.contrib.auth.base_user import AbstractBaseUser, BaseUserManager
   File "/usr/local/lib/python3.6/site-packages/django/contrib/auth/base_user.py", line 48, in <module>
     class AbstractBaseUser(models.Model):
   File "/usr/local/lib/python3.6/site-packages/django/db/models/base.py", line 122, in __new__
     new_class.add_to_class('_meta', Options(meta, app_label))
   File "/usr/local/lib/python3.6/site-packages/django/db/models/base.py", line 326, in add_to_class
     value.contribute_to_class(cls, name)
   File "/usr/local/lib/python3.6/site-packages/django/db/models/options.py", line 206, in contribute_to_class
     self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
   File "/usr/local/lib/python3.6/site-packages/django/db/__init__.py", line 28, in __getattr__
     return getattr(connections[DEFAULT_DB_ALIAS], item)
   File "/usr/local/lib/python3.6/site-packages/django/db/utils.py", line 214, in __getitem__
     backend = load_backend(db['ENGINE'])
   File "/usr/local/lib/python3.6/site-packages/django/db/utils.py", line 111, in load_backend
     return import_module('%s.base' % backend_name)
   File "/usr/lib64/python3.6/importlib/__init__.py", line 126, in import_module
     return _bootstrap._gcd_import(name[level:], package, level)
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/backends/postgis/base.py", line 6, in <module>
     from .features import DatabaseFeatures
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/backends/postgis/features.py", line 1, in <module>
     from django.contrib.gis.db.backends.base.features import BaseSpatialFeatures
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/backends/base/features.py", line 3, in <module>
     from django.contrib.gis.db import models
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/models/__init__.py", line 3, in <module>
     import django.contrib.gis.db.models.functions  # NOQA
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/models/functions.py", line 3, in <module>
     from django.contrib.gis.db.models.fields import BaseSpatialField, GeometryField
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/db/models/fields.py", line 3, in <module>
     from django.contrib.gis import forms, gdal
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/forms/__init__.py", line 3, in <module>
     from .fields import (  # NOQA
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/forms/fields.py", line 2, in <module>
     from django.contrib.gis.gdal import GDALException
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/gdal/__init__.py", line 28, in <module>
     from django.contrib.gis.gdal.datasource import DataSource
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/gdal/datasource.py", line 39, in <module>
     from django.contrib.gis.gdal.driver import Driver
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
     from django.contrib.gis.gdal.prototypes import ds as vcapi, raster as rcapi
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 9, in <module>
     from django.contrib.gis.gdal.libgdal import GDAL_VERSION, lgdal
   File "/usr/local/lib/python3.6/site-packages/django/contrib/gis/gdal/libgdal.py", line 109, in <module>
     err_handler = CPLErrorHandler(err_handler)
 MemoryError

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