I've the following error in a Django application using PostGIS.
The app was recently working fine. Is this related to a change on the system?

OSError: /usr/gdal32/lib/libgdal.so.28: undefined symbol: proj_crs_get_datum_ensemble

Via psql:

db_name=> SELECT PostGIS_Full_Version();
postgis_full_version
-------------------
 POSTGIS="2.5.5" [EXTENSION] PGSQL="110" GEOS="3.8.1-CAPI-1.13.3" SFCGAL="1.3.1" PROJ="Rel. 7.1.1, September 1st, 2020" GDAL="GDAL 3.1.3, released 2020/09/01"
 LIBXML="2.9.1" LIBJSON="0.11" LIBPROTOBUF="1.0.2" TOPOLOGY RASTER
  • sean replied to this.

    ppo Hi Pascal, we installed some packages related to gdal yesterday but this was not expected.

    I've uninstalled those on your server, can you let me know if that solved your problem?

      Thanks @sean it's working again now.
      Can you please do it also on opal9; as I'll install the same kind of app today or tomorrow.

      • sean replied to this.

        I am seeing this same thing on opal7 today. Any help? sean

        OSError: /usr/gdal32/lib/libgdal.so.28: undefined symbol: proj_crs_get_datum_ensemble

            23 days later

            I'm still getting this error on Opal1. I'm running in python2.7

            Traceback (most recent call last):
  File "manage.py", line 9, in <module>
    execute_from_command_line(sys.argv)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/core/management/__init__.py", line 385, in execute_from_command_line
    utility.execute()
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/core/management/__init__.py", line 354, in execute
    django.setup()
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/__init__.py", line 21, in setup
    apps.populate(settings.INSTALLED_APPS)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/apps/registry.py", line 108, in populate
    app_config.import_models(all_models)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/apps/config.py", line 202, in import_models
    self.models_module = import_module(models_module_name)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/auth/models.py", line 40, in <module>
    class Permission(models.Model):
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/db/models/base.py", line 122, in __new__
    new_class.add_to_class('_meta', Options(meta, **kwargs))
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/db/models/base.py", line 297, in add_to_class
    value.contribute_to_class(cls, name)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/db/models/options.py", line 166, in contribute_to_class
    self.db_table = truncate_name(self.db_table, connection.ops.max_name_length())
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/db/__init__.py", line 40, in __getattr__
    return getattr(connections[DEFAULT_DB_ALIAS], item)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/db/utils.py", line 242, in __getitem__
    backend = load_backend(db['ENGINE'])
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/db/utils.py", line 108, in load_backend
    return import_module('%s.base' % backend_name)
  File "/usr/lib64/python2.7/importlib/__init__.py", line 37, in import_module
    __import__(name)
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/gis/db/backends/postgis/base.py", line 4, in <module>
    from django.contrib.gis.db.backends.postgis.introspection import PostGISIntrospection
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/gis/db/backends/postgis/introspection.py", line 2, in <module>
    from django.contrib.gis.gdal import OGRGeomType
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/gis/gdal/__init__.py", line 46, in <module>
    from django.contrib.gis.gdal.driver import Driver  # NOQA
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/gis/gdal/driver.py", line 5, in <module>
    from django.contrib.gis.gdal.prototypes import ds as capi
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/gis/gdal/prototypes/ds.py", line 8, in <module>
    from django.contrib.gis.gdal.libgdal import lgdal
  File "/home/futuregreen/.virtualenvs/sup/lib/python2.7/site-packages/django/contrib/gis/gdal/libgdal.py", line 48, in <module>
    lgdal = CDLL(lib_path)
  File "/usr/lib64/python2.7/ctypes/__init__.py", line 360, in __init__
    self._handle = _dlopen(self._name, mode)
OSError: /usr/gdal32/lib/libgdal.so.28: undefined symbol: proj_crs_get_datum_ensemble
            • sean replied to this.

              Thanks, but I am still getting the error. Is there anything I need to do on my end?

              • sean replied to this.

                dmeehan No, that was my fault. The fix was still pending, but it's done now. If the error persists then please restart your app.

                  8 months later

                  have trying to sort this error but haven't been able kindly help
                  OSError: /lib/libgdal.so.28: undefined symbol: proj_crs_get_datum_ensemble

                  • sean replied to this.
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