doowhtron opened a new issue #13685:
URL: https://github.com/apache/airflow/issues/13685
**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**: Server version: 8.0.22 MySQL Community Server - GPL
**What happened**:
Scheduler died when I try to modify a dag's schedule_interval from "None" to
"* */1 * * *"(I edited the dag file in the dag folder and saved it). A few
minutes later I tried to start the scheduler again and it began to run.
And the logs are as follows:
```
{2021-01-15 09:06:22,636} {{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.IntegrityError: (1062, "Duplicate entry
'huge_demo13499411352-2021-01-15 01:04:00.000000' for key 'dag_run.dag_id'")
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 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 1474, in _do_scheduling
self._create_dag_runs(query.all(), session)
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/airflow/jobs/scheduler_job.py",
line 1561, in _create_dag_runs
dag.create_dagrun(
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/dag.py",
line 1807, in create_dagrun
session.flush()
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/session.py",
line 2540, in flush
self._flush(objects)
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/session.py",
line 2682, in _flush
transaction.rollback(_capture_exception=True)
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/util/langhelpers.py",
line 68, in __exit__
compat.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/orm/session.py",
line 2642, in _flush
flush_context.execute()
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/unitofwork.py",
line 422, in execute
rec.execute(self)
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/unitofwork.py",
line 586, in execute
persistence.save_obj(
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/persistence.py",
line 239, in save_obj
_emit_insert_statements(
File
"/home/app/.pyenv/versions/3.8.1/envs/airflow-py381/lib/python3.8/site-packages/sqlalchemy/orm/persistence.py",
line 1135, in _emit_insert_statements
result = cached_connections[connection].execute(
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.IntegrityError: (MySQLdb._exceptions.IntegrityError) (1062,
"Duplicate entry 'huge_demo13499411352-2021-01-15 01:04:00.000000' for key
'dag_run.dag_id'")
[SQL: INSERT INTO dag_run (dag_id, execution_date, start_date, end_date,
state, run_id, creating_job_id, external_trigger, run_type, conf,
last_scheduling_decision, dag_hash) VALUES (%s, %s, %s, %s, %s, %s, %s, %s, %s,
%s, %s, %s)]
[parameters: ('huge_demo13499411352', datetime.datetime(2021, 1, 15, 1, 4),
datetime.datetime(2021, 1, 15, 1, 6, 22, 629433), None, 'running',
'scheduled__2021-01-15T01:04:00+00:00', 71466, 0, <DagRunType.SCHEDULED:
'scheduled'>, b'\x80\x05}\x94.', None, '60078c379cdeecb9bc8844eed5aa9745')]
(Background on this error at: http://sqlalche.me/e/13/gkpj)
{2021-01-15 09:06:23,648} {{process_utils.py:95}} INFO - Sending
Signals.SIGTERM to GPID 66351
{2021-01-15 09:06:23,781} {{process_utils.py:61}} INFO - Process
psutil.Process(pid=66351, status='terminated') (66351) terminated with exit
code 0
{2021-01-15 09:06:23,781} {{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**:
No
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