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Posted to commits@airflow.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2018/09/04 22:53:00 UTC
[jira] [Commented] (AIRFLOW-3006) Error when
schedule_interval="None"
[ https://issues.apache.org/jira/browse/AIRFLOW-3006?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16603685#comment-16603685 ]
ASF GitHub Bot commented on AIRFLOW-3006:
-----------------------------------------
kaxil opened a new pull request #3846: [AIRFLOW-3006] Fix issue with schedule_interval='None'
URL: https://github.com/apache/incubator-airflow/pull/3846
Make sure you have checked _all_ steps below.
### Jira
- [x] My PR addresses the following [Airflow Jira](https://issues.apache.org/jira/browse/AIRFLOW/) issues and references them in the PR title. For example, "\[AIRFLOW-XXX\] My Airflow PR"
- https://issues.apache.org/jira/browse/AIRFLOW-3006
- In case you are fixing a typo in the documentation you can prepend your commit with \[AIRFLOW-XXX\], code changes always need a Jira issue.
### Description
- [x] Here are some details about my PR, including screenshots of any UI changes:
When `schedule_interval` is set to `"None"` (Not python literal `None` but 'None' string) as shown in the example below:
```python
dag = DAG('params-temp3',
default_args=default_args, schedule_interval='None')
```
it gives the following error:
```python
[2018-09-04 23:26:21,515] {dag_processing.py:582} INFO - Started a process (PID: 65903) to generate tasks for /Users/kaxil/airflow/dags/params-temp1.py
Process DagFileProcessor386-Process:
Traceback (most recent call last):
File "/Users/kaxil/anaconda2/lib/python2.7/multiprocessing/process.py", line 267, in _bootstrap
self.run()
File "/Users/kaxil/anaconda2/lib/python2.7/multiprocessing/process.py", line 114, in run
self._target(*self._args, **self._kwargs)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 388, in helper
pickle_dags)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/utils/db.py", line 74, in wrapper
return func(*args, **kwargs)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 1832, in process_file
self._process_dags(dagbag, dags, ti_keys_to_schedule)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 1422, in _process_dags
dag_run = self.create_dag_run(dag)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/utils/db.py", line 74, in wrapper
return func(*args, **kwargs)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 856, in create_dag_run
next_run_date = dag.normalize_schedule(min(task_start_dates))
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/models.py", line 3410, in normalize_schedule
following = self.following_schedule(dttm)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/models.py", line 3353, in following_schedule
cron = croniter(self._schedule_interval, dttm)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/croniter/croniter.py", line 92, in __init__
self.expanded, self.nth_weekday_of_month = self.expand(expr_format)
File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/croniter/croniter.py", line 467, in expand
raise CroniterBadCronError(cls.bad_length)
CroniterBadCronError: Exactly 5 or 6 columns has to be specified for iteratorexpression.
[2018-09-04 23:26:22,657] {dag_processing.py:495} INFO - Processor for /Users/kaxil/airflow/dags/params-temp1.py finished
```
Our documentation at https://airflow.apache.org/scheduler.html#dag-runs has 'None' as **preset** since 1.8.2 or even before, hence we should accept **"None"** as a valid `schedule_interval` apart from **None**
### Tests
- [x] My PR adds the following unit tests __OR__ does not need testing for this extremely good reason:
- `test_scheduler_dagrun_none `
### Commits
- [x] My commits all reference Jira issues in their subject lines, and I have squashed multiple commits if they address the same issue. In addition, my commits follow the guidelines from "[How to write a good git commit message](http://chris.beams.io/posts/git-commit/)":
1. Subject is separated from body by a blank line
1. Subject is limited to 50 characters (not including Jira issue reference)
1. Subject does not end with a period
1. Subject uses the imperative mood ("add", not "adding")
1. Body wraps at 72 characters
1. Body explains "what" and "why", not "how"
### Documentation
- [x] In case of new functionality, my PR adds documentation that describes how to use it.
- When adding new operators/hooks/sensors, the autoclass documentation generation needs to be added.
### Code Quality
- [x] Passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
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> Error when schedule_interval="None"
> -----------------------------------
>
> Key: AIRFLOW-3006
> URL: https://issues.apache.org/jira/browse/AIRFLOW-3006
> Project: Apache Airflow
> Issue Type: Improvement
> Components: core, scheduler
> Affects Versions: 1.8.2, 1.9.0, 1.10.0
> Reporter: Kaxil Naik
> Assignee: Kaxil Naik
> Priority: Major
> Fix For: 1.10.1
>
>
> When `schedule_interval` is set to `"None"`, it gives the following error:
> {code:python}
> dag = DAG('params-temp3',
> default_args=default_args, schedule_interval='None')
> {code}
> {code:python}
> [2018-09-04 23:26:21,515] {dag_processing.py:582} INFO - Started a process (PID: 65903) to generate tasks for /Users/kaxil/airflow/dags/params-temp1.py
> Process DagFileProcessor386-Process:
> Traceback (most recent call last):
> File "/Users/kaxil/anaconda2/lib/python2.7/multiprocessing/process.py", line 267, in _bootstrap
> self.run()
> File "/Users/kaxil/anaconda2/lib/python2.7/multiprocessing/process.py", line 114, in run
> self._target(*self._args, **self._kwargs)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 388, in helper
> pickle_dags)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/utils/db.py", line 74, in wrapper
> return func(*args, **kwargs)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 1832, in process_file
> self._process_dags(dagbag, dags, ti_keys_to_schedule)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 1422, in _process_dags
> dag_run = self.create_dag_run(dag)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/utils/db.py", line 74, in wrapper
> return func(*args, **kwargs)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/jobs.py", line 856, in create_dag_run
> next_run_date = dag.normalize_schedule(min(task_start_dates))
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/models.py", line 3410, in normalize_schedule
> following = self.following_schedule(dttm)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/airflow/models.py", line 3353, in following_schedule
> cron = croniter(self._schedule_interval, dttm)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/croniter/croniter.py", line 92, in __init__
> self.expanded, self.nth_weekday_of_month = self.expand(expr_format)
> File "/Users/kaxil/.virtualenvs/tst-pip-airflow/lib/python2.7/site-packages/croniter/croniter.py", line 467, in expand
> raise CroniterBadCronError(cls.bad_length)
> CroniterBadCronError: Exactly 5 or 6 columns has to be specified for iteratorexpression.
> [2018-09-04 23:26:22,657] {dag_processing.py:495} INFO - Processor for /Users/kaxil/airflow/dags/params-temp1.py finished
> {code}
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