Error: ('IM004', "[IM004] [unixODBC][Driver Manager]Driver's SQLAllocHandle on SQL_HANDLE_HENV failed (0) (SQLDriverConnect)")

[jakedubb]

Getting this error when attempting to use pyodbc in my django application. When I ssh into the container I am able to use sqlcmd to execute queries using the same connection string as my app is using. I've seen that this might be a permissions issue however I have configured everything to run as root and am still seeing this issue.

Stack Trace:

Error: ('IM004', "[IM004] [unixODBC][Driver Manager]Driver's SQLAllocHandle on SQL_HANDLE_HENV failed (0) (SQLDriverConnect)")
File "django/db/backends/base/base.py", line 199, in ensure_connection
self.connect()
File "django/db/backends/base/base.py", line 171, in connect
self.connection = self.get_new_connection(conn_params)
File "sql_server/pyodbc/base.py", line 303, in get_new_connection
timeout=timeout)
Error: ('IM004', "[IM004] [unixODBC][Driver Manager]Driver's SQLAllocHandle on SQL_HANDLE_HENV failed (0) (SQLDriverConnect)")
File "django/core/handlers/exception.py", line 39, in inner
response = get_response(request)
File "django/core/handlers/base.py", line 249, in _legacy_get_response
response = self._get_response(request)
File "django/core/handlers/base.py", line 187, in _get_response
response = self.process_exception_by_middleware(e, request)
File "django/core/handlers/base.py", line 185, in _get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "app/views.py", line 40, in app_index
dom = DomainNames.availabledoms.random()
File "app/models.py", line 81, in random
count = self.aggregate(count=Count('id'))['count']
File "django/db/models/manager.py", line 85, in manager_method
return getattr(self.get_queryset(), name)(*args, **kwargs)
File "django/db/models/query.py", line 356, in aggregate
return query.get_aggregation(self.db, kwargs.keys())
File "django/db/models/sql/query.py", line 457, in get_aggregation
result = compiler.execute_sql(SINGLE)
File "django/db/models/sql/compiler.py", line 824, in execute_sql
sql, params = self.as_sql()
File "sql_server/pyodbc/compiler.py", line 73, in as_sql
extra_select, order_by, group_by = self.pre_sql_setup()
File "django/db/models/sql/compiler.py", line 46, in pre_sql_setup
self.setup_query()
File "django/db/models/sql/compiler.py", line 37, in setup_query
self.select, self.klass_info, self.annotation_col_map = self.get_select()
File "django/db/models/sql/compiler.py", line 226, in get_select
ret.append((col, self.compile(col, select_format=True), alias))
File "sql_server/pyodbc/compiler.py", line 213, in compile
return super(SQLCompiler, self).compile(node, select_format)
File "django/db/models/sql/compiler.py", line 351, in compile
sql, params = vendor_impl(self, self.connection)
File "sql_server/pyodbc/compiler.py", line 23, in _as_sql_count
return self.as_sql(compiler, connection, function='COUNT_BIG')
File "django/db/models/expressions.py", line 517, in as_sql
connection.ops.check_expression_support(self)
File "sql_server/pyodbc/operations.py", line 78, in check_expression_support
if self.connection.sql_server_version < 2008:
File "django/utils/functional.py", line 35, in get
res = instance.dict[self.name] = self.func(instance)
File "sql_server/pyodbc/base.py", line 390, in sql_server_version
with self.temporary_connection() as cursor:
File "python3.6/contextlib.py", line 81, in enter
return next(self.gen)
File "django/db/backends/base/base.py", line 564, in temporary_connection
cursor = self.cursor()
File "django/db/backends/base/base.py", line 231, in cursor
cursor = self.make_debug_cursor(self._cursor())
File "django/db/backends/base/base.py", line 204, in _cursor
self.ensure_connection()
File "django/db/backends/base/base.py", line 199, in ensure_connection
self.connect()
File "django/db/utils.py", line 94, in exit
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "django/utils/six.py", line 685, in reraise
raise value.with_traceback(tb)
File "django/db/backends/base/base.py", line 199, in ensure_connection
self.connect()
File "django/db/backends/base/base.py", line 171, in connect
self.connection = self.get_new_connection(conn_params)
File "sql_server/pyodbc/base.py", line 303, in get_new_connection
timeout=timeout)

[Robert Peteuil]

Thanks for the heads up on this.

Based on a search of the error, it certainly appears to be some sort of permission error. The MS driver was difficult to get working in a container, so I suspect they may have changed something that requires another tweak.

[Michael Dockter]

Related issue: microsoft/mssql-docker#431