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Posted to commits@airflow.apache.org by GitBox <gi...@apache.org> on 2021/01/06 09:05:31 UTC
[GitHub] [airflow] xawyong opened a new issue #13507: after use daskexecutor, scheduler can not startup
xawyong opened a new issue #13507:
URL: https://github.com/apache/airflow/issues/13507
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**Apache Airflow version**:
```
[root@test ~]# airflow version
2.0.0
[root@test ~]# airflow config get-value core executor
SequentialExecutor
[root@test ~]#
```
**Kubernetes version (if you are using kubernetes)** (use `kubectl version`):
N/A
**Environment**:
```
[root@test ~]# uname -a
Linux test 3.10.0-1160.11.1.el7.x86_64 #1 SMP Mon Nov 30 13:05:31 EST 2020 x86_64 x86_64 x86_64 GNU/Linux
[root@test ~]# cat /etc/redhat-release
Red Hat Enterprise Linux Server release 7.9 (Maipo)
[root@test ~]# cat /etc/os-release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.9 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.9"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.9 (Maipo)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.9:GA:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.9
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.9"
[root@test ~]#
```
- **Cloud provider or hardware configuration**:
- **OS** (e.g. from /etc/os-release):
- **Kernel** (e.g. `uname -a`):
- **Install tools**:
- **Others**:
**What happened**:
just follow [quick start](https://airflow.apache.org/docs/apache-airflow/stable/start.html), and config
```
executor = DaskExecutor
and sql_alchemy_conn = postgresql://postgres:postgres@localhost:5432/airflow
```
then run
```
airflow db init
airflow db reset
airflow webserver -D
[root@test ~]# airflow scheduler
____________ _____________
____ |__( )_________ __/__ /________ __
____ /| |_ /__ ___/_ /_ __ /_ __ \_ | /| / /
___ ___ | / _ / _ __/ _ / / /_/ /_ |/ |/ /
_/_/ |_/_/ /_/ /_/ /_/ \____/____/|__/
[2021-01-06 03:58:31,138] {scheduler_job.py:1241} INFO - Starting the scheduler
[2021-01-06 03:58:31,139] {scheduler_job.py:1246} INFO - Processing each file at most -1 times
/usr/local/lib/python3.7/site-packages/distributed/client.py:1128 VersionMismatchWarning: Mismatched versions found
+-------------+-----------+-----------------------+-----------------------+
| Package | client | scheduler | workers |
+-------------+-----------+-----------------------+-----------------------+
| distributed | 2020.12.0 | 2020.12.0+11.g4386b75 | 2020.12.0+11.g4386b75 |
+-------------+-----------+-----------------------+-----------------------+
[2021-01-06 03:58:31,195] {dag_processing.py:250} INFO - Launched DagFileProcessorManager with pid: 16318
[2021-01-06 03:58:31,197] {scheduler_job.py:1751} INFO - Resetting orphaned tasks for active dag runs
[2021-01-06 03:58:31,203] {settings.py:52} INFO - Configured default timezone Timezone('UTC')
[2021-01-06 03:58:31,227] {scheduler_job.py:1293} ERROR - Exception when executing SchedulerJob._run_scheduler_loop
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1277, in _execute_context
cursor, statement, parameters, context
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 593, in do_execute
cursor.execute(statement, parameters)
psycopg2.errors.SyntaxError: syntax error at or near "SKIP"
LINE 3: ...run.state = 'running' FOR UPDATE OF task_instance SKIP LOCKE...
^
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "/usr/local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py", line 1275, in _execute
self._run_scheduler_loop()
File "/usr/local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py", line 1349, in _run_scheduler_loop
self.adopt_or_reset_orphaned_tasks()
File "/usr/local/lib/python3.7/site-packages/airflow/utils/session.py", line 65, in wrapper
return func(*args, session=session, **kwargs)
File "/usr/local/lib/python3.7/site-packages/airflow/jobs/scheduler_job.py", line 1787, in adopt_or_reset_orphaned_tasks
tis_to_reset_or_adopt = with_row_locks(query, of=TI, **skip_locked(session=session)).all()
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3373, in all
return list(self)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3535, in __iter__
return self._execute_and_instances(context)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/orm/query.py", line 3560, in _execute_and_instances
result = conn.execute(querycontext.statement, self._params)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1011, in execute
return meth(self, multiparams, params)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/sql/elements.py", line 298, in _execute_on_connection
return connection._execute_clauseelement(self, multiparams, params)
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1130, in _execute_clauseelement
distilled_params,
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1317, in _execute_context
e, statement, parameters, cursor, context
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1511, in _handle_dbapi_exception
sqlalchemy_exception, with_traceback=exc_info[2], from_=e
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/util/compat.py", line 182, in raise_
raise exception
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/base.py", line 1277, in _execute_context
cursor, statement, parameters, context
File "/usr/local/lib/python3.7/site-packages/sqlalchemy/engine/default.py", line 593, in do_execute
cursor.execute(statement, parameters)
sqlalchemy.exc.ProgrammingError: (psycopg2.errors.SyntaxError) syntax error at or near "SKIP"
LINE 3: ...run.state = 'running' FOR UPDATE OF task_instance SKIP LOCKE...
^
[SQL: SELECT task_instance.task_id AS task_instance_task_id, task_instance.dag_id AS task_instance_dag_id, task_instance.execution_date AS task_instance_execution_date
FROM task_instance LEFT OUTER JOIN job ON task_instance.queued_by_job_id = job.id JOIN dag_run ON task_instance.dag_id = dag_run.dag_id AND task_instance.execution_date = dag_run.execution_date
WHERE task_instance.state IN (%(state_1)s, %(state_2)s, %(state_3)s) AND (task_instance.queued_by_job_id IS NULL OR job.state != %(state_4)s) AND dag_run.run_type != %(run_type_1)s AND dag_run.state = %(state_5)s FOR UPDATE OF task_instance SKIP LOCKED]
[parameters: {'state_1': 'scheduled', 'state_2': 'queued', 'state_3': 'running', 'state_4': 'running', 'run_type_1': <DagRunType.BACKFILL_JOB: 'backfill'>, 'state_5': 'running'}]
(Background on this error at: http://sqlalche.me/e/13/f405)
[2021-01-06 03:58:32,243] {process_utils.py:95} INFO - Sending Signals.SIGTERM to GPID 16318
[2021-01-06 03:58:32,448] {process_utils.py:201} INFO - Waiting up to 5 seconds for processes to exit...
[2021-01-06 03:58:32,465] {process_utils.py:61} INFO - Process psutil.Process(pid=16318, status='terminated', exitcode=0, started='03:58:30') (16318) terminated with exit code 0
[2021-01-06 03:58:32,466] {process_utils.py:61} INFO - Process psutil.Process(pid=16368, status='terminated', started='03:58:31') (16368) terminated with exit code None
[2021-01-06 03:58:32,466] {process_utils.py:61} INFO - Process psutil.Process(pid=16369, status='terminated', started='03:58:31') (16369) terminated with exit code None
[2021-01-06 03:58:32,467] {scheduler_job.py:1296} INFO - Exited execute loop
[root@test ~]#
```
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**What you expected to happen**:
<!-- What do you think went wrong? -->
**How to reproduce it**:
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**Anything else we need to know**:
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[GitHub] [airflow] potiuk closed issue #13507: after use daskexecutor, scheduler can not startup
Posted by GitBox <gi...@apache.org>.
potiuk closed issue #13507:
URL: https://github.com/apache/airflow/issues/13507
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[GitHub] [airflow] potiuk commented on issue #13507: after use daskexecutor, scheduler can not startup
Posted by GitBox <gi...@apache.org>.
potiuk commented on issue #13507:
URL: https://github.com/apache/airflow/issues/13507#issuecomment-755453996
I think you have too old version of Postgres.
See: https://github.com/apache/airflow#requirements 9.6 is minimum version supported/
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