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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2021/01/14 06:51:56 UTC

[GitHub] [airflow] doowhtron opened a new issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

doowhtron opened a new issue #13667:
URL: https://github.com/apache/airflow/issues/13667


   **Apache Airflow version**: 2.0.0
   
   
   **Kubernetes version (if you are using kubernetes)** (use `kubectl version`):
   
   **Environment**:
   
   - **Cloud provider or hardware configuration**: tencent cloud
   - **OS** (e.g. from /etc/os-release): centos7
   - **Kernel** (e.g. `uname -a`): 3.10
   - **Install tools**:
   - **Others**:
   
   **What happened**:
   
   Scheduler dies when I try to restart it. And the logs are as follows:
   ```
   2021-01-14 14:07:44,429} {{scheduler_job.py:1754}} INFO - Resetting orphaned tasks for active dag runs
   {2021-01-14 14:08:14,470} {{scheduler_job.py:1754}} INFO - Resetting orphaned tasks for active dag runs
   {2021-01-14 14:08:16,968} {{scheduler_job.py:1293}} ERROR - Exception when executing SchedulerJob._run_scheduler_loop
   Traceback (most recent call last):
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1275, in _execute
       self._run_scheduler_loop()
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1377, in _run_scheduler_loop
       num_queued_tis = self._do_scheduling(session)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1516, in _do_scheduling
       self._schedule_dag_run(dag_run, active_runs_by_dag_id.get(dag_run.dag_id, set()), session)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1629, in _schedule_dag_run
       dag = dag_run.dag = self.dagbag.get_dag(dag_run.dag_id, session=session)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/utils/session.py", line 62, in wrapper
       return func(*args, **kwargs)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/models/dagbag.py", line 187, in get_dag
       if sd_last_updated_datetime > self.dags_last_fetched[dag_id]:
   TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'
   {2021-01-14 14:08:17,975} {{process_utils.py:95}} INFO - Sending Signals.SIGTERM to GPID 53178
   {2021-01-14 14:08:18,212} {{process_utils.py:61}} INFO - Process psutil.Process(pid=58676, status='terminated') (58676) terminated with exit code None
   {2021-01-14 14:08:18,295} {{process_utils.py:201}} INFO - Waiting up to 5 seconds for processes to exit...
   {2021-01-14 14:08:18,345} {{process_utils.py:61}} INFO - Process psutil.Process(pid=53178, status='terminated') (53178) terminated with exit code 0
   {2021-01-14 14:08:18,345} {{process_utils.py:61}} INFO - Process psutil.Process(pid=58677, status='terminated') (58677) terminated with exit code None
   {2021-01-14 14:08:18,346} {{process_utils.py:61}} INFO - Process psutil.Process(pid=58678, status='terminated') (58678) terminated with exit code None
   {2021-01-14 14:08:18,346} {{process_utils.py:61}} INFO - Process psutil.Process(pid=58708, status='terminated') (58708) terminated with exit code None
   {2021-01-14 14:08:18,346} {{scheduler_job.py:1296}} INFO - Exited execute loop
   ```
   
   **What you expected to happen**:
   
   Schdeduler should not die.
   
   **How to reproduce it**:
   
   I don't know how to reproduce it
   
   **Anything else we need to know**:
   
   I just upgrade airflow from 1.10.14. Now I try to fix it temporarily by catching the exception in scheduler_job.py
   
   ```python
   for dag_run in dag_runs:
       try:
           self._schedule_dag_run(dag_run, active_runs_by_dag_id.get(dag_run.dag_id, set()), session)
       except Exception as e:
           self.log.exception(e)
   ```
   


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[GitHub] [airflow] doowhtron commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
doowhtron commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-760569528


   > @vikramkoka per the other [issue](https://github.com/apache/airflow/issues/13668) opened, their mysql version is:
   > 
   > Server version: 8.0.22 MySQL Community Server - GPL
   
   Yes, that's right


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[GitHub] [airflow] kaxil commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
kaxil commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763199559


   Did you run `airflow db upgrade` before upgrading to 2.0.0?
   
   https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/dagbag.py#L183-L188
   
   https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/serialized_dag.py#L254-L266
   
   I am not sure how `get_last_updated_datetime` can be none, for it to be `None`, you might need to have DAGs in DagBag for Webserver which is not possible.
   
   Is your Webserver and Scheduler both using 2.0.0 image?
   
   


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[GitHub] [airflow] kaxil closed issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
kaxil closed issue #13667:
URL: https://github.com/apache/airflow/issues/13667


   


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[GitHub] [airflow] lgwacker commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
lgwacker commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763967374


   I'm having the same issue here. But it only happens when I turn on some random dags. Couldn't reproduce it yet.


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[GitHub] [airflow] lgwacker removed a comment on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
lgwacker removed a comment on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763967374


   I'm having the same issue here. But it only happens when I turn on some random dags. Couldn't reproduce it yet.


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[GitHub] [airflow] lgwacker removed a comment on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
lgwacker removed a comment on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763967374


   I'm having the same issue here. But it only happens when I turn on some random dags. Couldn't reproduce it yet.


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[GitHub] [airflow] krisdock commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
krisdock commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-760477992


   @vikramkoka per the other [issue](https://github.com/apache/airflow/issues/13668) opened, their mysql version is:
   
   Server version: 8.0.22 MySQL Community Server - GPL


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[GitHub] [airflow] potiuk commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
potiuk commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-759970885


   Can you please create a separate issue for the "deadlock" one ? seems unrelated.


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[GitHub] [airflow] lgwacker commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
lgwacker commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763967374


   I'm having the same issue here. But it only happens when I turn on some random dags. Couldn't reproduce it yet.


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[GitHub] [airflow] vikramkoka commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
vikramkoka commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-760460714


   @doowhtron What version of MySQL are you running on? 


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[GitHub] [airflow] doowhtron commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
doowhtron commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-759969920


   Found another exception may cause the scheduler to die too...
   ```
   {2021-01-14 13:29:05,424} {{scheduler_job.py:1293}} ERROR - Exception when executing SchedulerJob._run_scheduler_loop
   Traceback (most recent call last):
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1276, in _execute_context
       self.dialect.do_execute(
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/default.py", line 609, in do_execute
       cursor.execute(statement, parameters)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/MySQLdb/cursors.py", line 209, in execute
       res = self._query(query)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/MySQLdb/cursors.py", line 315, in _query
       db.query(q)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/MySQLdb/connections.py", line 239, in query
       _mysql.connection.query(self, query)
   MySQLdb._exceptions.OperationalError: (1213, 'Deadlock found when trying to get lock; try restarting transaction')
   
   The above exception was the direct cause of the following exception:
   
   Traceback (most recent call last):
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1275, in _execute
       self._run_scheduler_loop()
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1349, in _run_scheduler_loop
       self.adopt_or_reset_orphaned_tasks()
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/utils/session.py", line 65, in wrapper
       return func(*args, session=session, **kwargs)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py", line 1758, in adopt_or_reset_orphaned_tasks
       session.query(SchedulerJob)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/query.py", line 4063, in update
       update_op.exec_()
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/persistence.py", line 1697, in exec_
       self._do_exec()
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/persistence.py", line 1895, in _do_exec
       self._execute_stmt(update_stmt)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/persistence.py", line 1702, in _execute_stmt
       self.result = self.query._execute_crud(stmt, self.mapper)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/query.py", line 3568, in _execute_crud
       return conn.execute(stmt, self._params)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1011, in execute
       return meth(self, multiparams, params)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/sql/elements.py", line 298, in _execute_on_connection
       return connection._execute_clauseelement(self, multiparams, params)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1124, in _execute_clauseelement
       ret = self._execute_context(
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1316, in _execute_context
       self._handle_dbapi_exception(
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1510, in _handle_dbapi_exception
       util.raise_(
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/util/compat.py", line 182, in raise_
       raise exception
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/base.py", line 1276, in _execute_context
       self.dialect.do_execute(
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/engine/default.py", line 609, in do_execute
       cursor.execute(statement, parameters)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/MySQLdb/cursors.py", line 209, in execute
       res = self._query(query)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/MySQLdb/cursors.py", line 315, in _query
       db.query(q)
     File "/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/MySQLdb/connections.py", line 239, in query
       _mysql.connection.query(self, query)
   sqlalchemy.exc.OperationalError: (MySQLdb._exceptions.OperationalError) (1213, 'Deadlock found when trying to get lock; try restarting transaction')
   [SQL: UPDATE job SET state=%s WHERE job.state = %s AND job.latest_heartbeat < %s]
   [parameters: ('failed', 'running', datetime.datetime(2021, 1, 14, 5, 28, 35, 157941))]
   (Background on this error at: http://sqlalche.me/e/13/e3q8)
   {2021-01-14 13:29:06,435} {{process_utils.py:95}} INFO - Sending Signals.SIGTERM to GPID 6293
   {2021-01-14 13:29:06,677} {{process_utils.py:61}} INFO - Process psutil.Process(pid=6318, status='terminated') (6318) terminated with exit code None
   {2021-01-14 13:29:06,767} {{process_utils.py:201}} INFO - Waiting up to 5 seconds for processes to exit...
   {2021-01-14 13:29:06,850} {{process_utils.py:61}} INFO - Process psutil.Process(pid=6320, status='terminated') (6320) terminated with exit code None
   {2021-01-14 13:29:06,850} {{process_utils.py:61}} INFO - Process psutil.Process(pid=6319, status='terminated') (6319) terminated with exit code None
   {2021-01-14 13:29:06,858} {{process_utils.py:61}} INFO - Process psutil.Process(pid=6321, status='terminated') (6321) terminated with exit code None
   {2021-01-14 13:29:06,864} {{process_utils.py:201}} INFO - Waiting up to 5 seconds for processes to exit...
   {2021-01-14 13:29:06,876} {{process_utils.py:61}} INFO - Process psutil.Process(pid=6293, status='terminated') (6293) terminated with exit code 0
   {2021-01-14 13:29:06,876} {{scheduler_job.py:1296}} INFO - Exited execute loop
   ```


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[GitHub] [airflow] potiuk edited a comment on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
potiuk edited a comment on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-759970885


   @doowhtron  Can you please create a separate issue for the "deadlock" one ? seems unrelated.


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[GitHub] [airflow] kaxil commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
kaxil commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763662670


   >I removed some of the dag files manually from the dags folder without deleting them from the UI. Is it related?
   
   Yea that _might_ (not sure yet -- I will try to reproduce that behavior)  be related and very likely, can you delete it from the UI but before deleting those dags from UI, can you post the entries for those dags from the `dag`, `serialized_dag` and `dag_run` table for your database please


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[GitHub] [airflow] kaxil edited a comment on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
kaxil edited a comment on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763199559


   Did you run `airflow db upgrade` before upgrading to 2.0.0?
   
   https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/dagbag.py#L183-L188
   
   https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/serialized_dag.py#L254-L266
   
   I am not sure how `get_last_updated_datetime` can be none, for it to be `None`, you might need to have DAGs in DagBag for Webserver/Scheduler and no records for that DAG in serialized_dag table which does not seem to be easily possible.
   
   Is your Webserver and Scheduler both using 2.0.0 image?
   
   


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[GitHub] [airflow] doowhtron commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
doowhtron commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763366592


   > Did you run `airflow db upgrade` before upgrading to 2.0.0?
   > 
   > https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/dagbag.py#L183-L188
   > 
   > https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/serialized_dag.py#L254-L266
   > 
   > I am not sure how `get_last_updated_datetime` can be none, for it to be `None`, you might need to have DAGs in DagBag for Webserver which is not possible.
   > 
   > Is your Webserver and Scheduler both using 2.0.0 image?
   
   I did run `airflow db upgrade`
   
   I removed some of the dag files manually from the dags folder without deleting them from the UI. Is it related?


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[GitHub] [airflow] kaxil edited a comment on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
kaxil edited a comment on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-763199559


   Did you run `airflow db upgrade` before upgrading to 2.0.0?
   
   https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/dagbag.py#L183-L188
   
   https://github.com/apache/airflow/blob/8a4bd3c73eb46c5ddd9312c71772a423fb1fd688/airflow/models/serialized_dag.py#L254-L266
   
   I am not sure how `get_last_updated_datetime` can be none, for it to be `None`, you might need to have DAGs in DagBag for Webserver/Scheduler and no records for that DAG in serialized_dag table which does not seem to be easily possible.
   
   Is your Webserver and Scheduler both using 2.0.0 image?
   
   


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[GitHub] [airflow] doowhtron commented on issue #13667: scheduler dies with "TypeError: '>' not supported between instances of 'NoneType' and 'datetime.datetime'"

Posted by GitBox <gi...@apache.org>.
doowhtron commented on issue #13667:
URL: https://github.com/apache/airflow/issues/13667#issuecomment-759971866


   > @doowhtron Can you please create a separate issue for the "deadlock" one ? seems unrelated.
   
   ok


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