amoghrajesh commented on PR #37214:
URL: https://github.com/apache/airflow/pull/37214#issuecomment-1931415839
Right now I am testing with the DAG:
```
from airflow import DAG
from airflow.providers.mongo.hooks.mongo import MongoHook
from airflow.operators.python_operator import PythonOperator
from datetime import datetime, timedelta
default_args = {
'owner': 'airflow',
'depends_on_past': False,
'start_date': datetime(2024, 2, 7),
'catchup': False,
}
def retrieve_users_from_mongodb():
mongo_hook = MongoHook(conn_id='mongo_conn')
query = {}
users_data = mongo_hook.find('users', query)
for user in users_data:
print(user)
with DAG('mongo_dag', default_args=default_args, schedule_interval=None) as
dag:
# Task to retrieve users from MongoDB
retrieve_users_task = PythonOperator(
task_id='retrieve_users_from_mongodb',
python_callable=retrieve_users_from_mongodb
)
# Define the task dependencies
retrieve_users_task
```
Connection:
For some reason, the connection is not going through, to mongodb
Error log:
```
e8786b12ac04
*** Found local files:
*** *
/root/airflow/logs/dag_id=mongo_dag/run_id=manual__2024-02-07T07:07:35.163848+00:00/task_id=retrieve_users_from_mongodb/attempt=1.log
[2024-02-07, 12:37:37 IST] {taskinstance.py:1980} INFO - Dependencies all
met for dep_context=non-requeueable deps ti=
[2024-02-07, 12:37:37 IST] {taskinstance.py:1980} INFO - Dependencies all
met for dep_context=requeueable deps ti=
[2024-02-07, 12:37:37 IST] {taskinstance.py:2194} INFO - Starting attempt 1
of 1
[2024-02-07, 12:37:37 IST] {taskinstance.py:2215} INFO - Executing on
2024-02-07 07:07:35.163848+00:00
[2024-02-07, 12:37:37 IST] {standard_task_runner.py:60} INFO - Started
process 1243 to run task
[2024-02-07, 12:37:37 IST] {standard_task_runner.py:87} INFO - Running:
['airflow', 'tasks', 'run', 'mongo_dag', 'retrieve_users_from_mongodb',
'manual__2024-02-07T07:07:35.163848+00:00', '--job-id', '920', '--raw',
'--subdir', 'DAGS_FOLDER/mongo_test.py', '--cfg-path', '/tmp/tmpkg6apbfb']
[2024-02-07, 12:37:37 IST] {standard_task_runner.py:88} INFO - Job 920:
Subtask retrieve_users_from_mongodb
[2024-02-07, 12:37:37 IST] {task_command.py:423} INFO - Running on host
e8786b12ac04
[2024-02-07, 12:37:37 IST] {taskinstance.py:2515} INFO - Exporting env vars:
AIRFLOW_CTX_DAG_EMAIL='airf...@example.com' AIRFLOW_CTX_DAG_OWNER='airflow'
AIRFLOW_CTX_DAG_ID='mongo_dag'
AIRFLOW_CTX_TASK_ID='retrieve_users_from_mongodb'
AIRFLOW_CTX_EXECUTION_DATE='2024-02-07T07:07:35.163848+00:00'
AIRFLOW_CTX_TRY_NUMBER='1'
AIRFLOW_CTX_DAG_RUN_ID='manual__2024-02-07T07:07:35.163848+00:00'
[2024-02-07, 12:37:37 IST] {base.py:83} INFO - Using connection ID 'myconn'
for task execution.
[2024-02-07, 12:38:08 IST] {taskinstance.py:2737} ERROR - Task failed with
exception
Traceback (most recent call last):
File "/opt/airflow/airflow/models/taskinstance.py", line 446, in
_execute_task
result = _execute_callable(context=context, **execute_callable_kwargs)
File "/opt/airflow/airflow/models/taskinstance.py", line 416, in
_execute_callable
return execute_callable(context=context, **execute_callable_kwargs)
File "/opt/airflow/airflow/operators/python.py", line 199, in execute
return_value = self.execute_callable()
File "/opt/airflow/airflow/operators/python.py", line 216, in
execute_callable
return self.python_callable(*self.op_args, **self.op_kwargs)
File "/files/dags/mongo_test.py", line 28, in retrieve_users_from_mongodb
for user in users_data:
File "/usr/local/lib/python3.8/site-packages/pymongo/cursor.py", line
1264, in next
if len(self.__data) or self._refresh():
File "/usr/local/lib/python3.8/site-packages/pymongo/cursor.py", line
1155, in _refresh
self.__session = self.__collection.database.client._ensure_session()
File "/usr/local/lib/python3.8/site-packages/pymongo/mongo_client.py",
line 1823, in _ensure_session
return self.__start_session(True, causal_consistency=False)
File "/usr/local/lib/python3.8/site-packages/pymongo/mongo_client.py",
line 1766, in __start_session
self._topology._check_implicit_session_support()
File "/usr/local/lib/python3.8/site-packages/pymongo/topology.py", line
573, in _check_implicit_session_support
self._check_session_support()
File "/usr/local/lib/python3.8/site-packages/pymongo/topology.py", line
589, in _check_session_support
self._select_servers_loop(
File "/usr/local/lib/python3.8/site-packages/pymongo/topology.py", line
259, in _select_servers_loop
raise ServerSelectionTimeoutError(
pymongo.errors.ServerSelectionTimeoutError: 127.0.0.1:27017: [Errno 111]
Connection refused (configured timeouts: socketTimeoutMS: 20000.0ms,
connectTimeoutMS: 20000.0ms), Timeout: 30s, Topology Description: ]>
[2024-02-07, 12:38:08 IST] {taskinstance.py:1152} INFO - Marking task as
FAILED. dag_id=mongo_dag, task_id=retrieve_users_from_mongodb,
execution_date=20240207T070735, start_date=20240207T070737,
end_date=20240207T070808
[2024-02-07, 12:38:08 IST] {standard_task_runner.py:107} ERROR - Failed to
execute job 920 for task retrieve_users_from_mongodb (127.0.0.1:27017: [Errno
111] Connection refused (configured timeouts: socketTimeoutMS: 20000.0ms,
connectTimeoutMS: 20000.0ms), Timeout: 30s, Topology Description: ]>; 1243)
[2024-02-07, 12:38:08 IST] {local_task_job_runner.py:234} INFO - Task exited
with return code 1
[2024-02-07, 12:38:08 IST] {taskinstance.py:3318} INFO - 0 downstream tasks
scheduled from follow-on schedule check
```
Point to note is that when I use pymongo directly, it works
```
from pymongo import MongoClient
mongo_host = "127.0.0.1"
mongo_port = 27017
mongo_database = "test"
mongo_collection = "users"
client = MongoClient(mongo_host, mongo_port)
db = client[mongo_database]
collection = db[mongo_collection]
query_result = collection.find_one({"name": "John"})
print("Query result:", query_result)
```
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