AttributeError: Can't get attribute 'MissingType' on <module 'jinja2.utils' from '/home/upload/airflow-2.0/local/lib/python3.6/site-packages/jinja2/utils.py'>

[wlf061]

Hi,
When i start the airflow scheduler like:
airflow scheduler --do-pickle

Here are some error logs like:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/pickle.py", line 269, in _getattribute
    obj = getattr(obj, subpath)
AttributeError: module 'jinja2.utils' has no attribute 'MissingType'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/pickle.py", line 918, in save_global
    obj2, parent = _getattribute(module, name)
  File "/usr/lib64/python3.6/pickle.py", line 272, in _getattribute
    .format(name, obj))
AttributeError: Can't get attribute 'MissingType' on <module 'jinja2.utils' from '/home/upload/airflow-2.0/local/lib/python3.6/site-packages/jinja2/utils.py'>

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1204, in _execute_context
    context = constructor(dialect, self, conn, *args)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/default.py", line 854, in _init_compiled
    param.append(processors[key](compiled_params[key]))
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/sql/sqltypes.py", line 1702, in process
    value = dumps(value, protocol)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 273, in dumps
    dump(obj, file, protocol, byref, fmode, recurse, **kwds)#, strictio)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 267, in dump
    Pickler(file, protocol, **_kwds).dump(obj)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 454, in dump
    StockPickler.dump(self, obj)
  File "/usr/lib64/python3.6/pickle.py", line 409, in dump
    self.save(obj)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 846, in _batch_setitems
    save(k)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib64/python3.6/pickle.py", line 781, in save_list
    self._batch_appends(obj)
  File "/usr/lib64/python3.6/pickle.py", line 808, in _batch_appends
    save(tmp[0])
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 1447, in save_function
    obj.__dict__, fkwdefaults), obj=obj)
  File "/usr/lib64/python3.6/pickle.py", line 610, in save_reduce
    save(args)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib64/python3.6/pickle.py", line 751, in save_tuple
    save(element)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 605, in save_reduce
    save(cls)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 1390, in save_type
    StockPickler.save_global(pickler, obj, name=name)
  File "/usr/lib64/python3.6/pickle.py", line 922, in save_global
    (obj, module_name, name))
_pickle.PicklingError: Can't pickle <class 'jinja2.utils.MissingType'>: it's not found as jinja2.utils.MissingType

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "/usr/lib64/python3.6/multiprocessing/process.py", line 249, in _bootstrap
    self.run()
  File "/usr/lib64/python3.6/multiprocessing/process.py", line 93, in run
    self._target(*self._args, **self._kwargs)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/airflow/jobs/scheduler_job.py", line 187, in _run_file_processor
    callback_requests=callback_requests,
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/airflow/utils/session.py", line 65, in wrapper
    return func(*args, session=session, **kwargs)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/airflow/jobs/scheduler_job.py", line 658, in process_file
    dag.pickle(session)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/airflow/utils/session.py", line 62, in wrapper
    return func(*args, **kwargs)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/airflow/models/dag.py", line 1558, in pickle
    session.commit()
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/session.py", line 1046, in commit
    self.transaction.commit()
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/session.py", line 504, in commit
    self._prepare_impl()
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/session.py", line 483, in _prepare_impl
    self.session.flush()
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/session.py", line 2540, in flush
    self._flush(objects)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/session.py", line 2682, in _flush
    transaction.rollback(_capture_exception=True)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/util/langhelpers.py", line 70, in __exit__
    with_traceback=exc_tb,
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 182, in raise_
    raise exception
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/session.py", line 2642, in _flush
    flush_context.execute()
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/unitofwork.py", line 422, in execute
    rec.execute(self)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/unitofwork.py", line 589, in execute
    uow,
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/persistence.py", line 245, in save_obj
    insert,
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/orm/persistence.py", line 1136, in _emit_insert_statements
    statement, params
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1011, in execute
    return meth(self, multiparams, params)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/sql/elements.py", line 298, in _execute_on_connection
    return connection._execute_clauseelement(self, multiparams, params)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1130, in _execute_clauseelement
    distilled_params,
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1207, in _execute_context
    e, util.text_type(statement), parameters, None, None
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1511, in _handle_dbapi_exception
    sqlalchemy_exception, with_traceback=exc_info[2], from_=e
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/util/compat.py", line 182, in raise_
    raise exception
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/base.py", line 1204, in _execute_context
    context = constructor(dialect, self, conn, *args)
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/engine/default.py", line 854, in _init_compiled
    param.append(processors[key](compiled_params[key]))
  File "/home/upload/airflow-2.0/local/lib64/python3.6/site-packages/sqlalchemy/sql/sqltypes.py", line 1702, in process
    value = dumps(value, protocol)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 273, in dumps
    dump(obj, file, protocol, byref, fmode, recurse, **kwds)#, strictio)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 267, in dump
    Pickler(file, protocol, **_kwds).dump(obj)
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 454, in dump
    StockPickler.dump(self, obj)
  File "/usr/lib64/python3.6/pickle.py", line 409, in dump
    self.save(obj)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 846, in _batch_setitems
    save(k)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib64/python3.6/pickle.py", line 781, in save_list
    self._batch_appends(obj)
  File "/usr/lib64/python3.6/pickle.py", line 808, in _batch_appends
    save(tmp[0])
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 634, in save_reduce
    save(state)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 1447, in save_function
    obj.__dict__, fkwdefaults), obj=obj)
  File "/usr/lib64/python3.6/pickle.py", line 610, in save_reduce
    save(args)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/usr/lib64/python3.6/pickle.py", line 751, in save_tuple
    save(element)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 941, in save_module_dict
    StockPickler.save_dict(pickler, obj)
  File "/usr/lib64/python3.6/pickle.py", line 821, in save_dict
    self._batch_setitems(obj.items())
  File "/usr/lib64/python3.6/pickle.py", line 847, in _batch_setitems
    save(v)
  File "/usr/lib64/python3.6/pickle.py", line 521, in save
    self.save_reduce(obj=obj, *rv)
  File "/usr/lib64/python3.6/pickle.py", line 605, in save_reduce
    save(cls)
  File "/usr/lib64/python3.6/pickle.py", line 476, in save
    f(self, obj) # Call unbound method with explicit self
  File "/home/upload/airflow-2.0/local/lib/python3.6/site-packages/dill/_dill.py", line 1390, in save_type
    StockPickler.save_global(pickler, obj, name=name)
  File "/usr/lib64/python3.6/pickle.py", line 922, in save_global
    (obj, module_name, name))
sqlalchemy.exc.StatementError: (_pickle.PicklingError) Can't pickle <class 'jinja2.utils.MissingType'>: it's not found as jinja2.utils.MissingType

The list is my running env:

• airflow 2.0.1
• my dag is

from airflow import DAG
from airflow.operators.python import PythonOperator
from airflow.utils.dates import days_ago

args = {
    'owner': 'nancy',
}

with DAG(
    dag_id='verify_python_function',
    default_args=args,
    schedule_interval='0 2 * * *',
    start_date=days_ago(2)
) as dag:

    # [START howto_operator_python_kwargs]
    def print_function(**kwargs):
        """This is a function that will run within the DAG execution"""
        print(kwargs['year'])

    # Generate 5 sleeping tasks, sleeping from 0.0 to 0.4 seconds respectively
    task = PythonOperator(
            task_id='sleep_for_1',
            python_callable=print_function,
            op_kwargs={"year":"{{ macros.ds_format(macros.ds_add(ds,-1), '%Y-%m-%d','%Y') }}","month":"{{ macros.ds_format(macros.ds_add(ds,-1), '%Y-%m-%d','%m') }}","day":"{{ macros.ds_format(macros.ds_add(ds,-1), '%Y-%m-%d','%d') }}"},

The dag is worked on the airflow 1.10.14, but on the 2.0.1,there has some error logs, but the dag can work well.
Has anyone encountered this kind of problem here?