[
https://issues.apache.org/jira/browse/AIRFLOW-6385?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17007625#comment-17007625
]
ASF GitHub Bot commented on AIRFLOW-6385:
-----------------------------------------
kaxil commented on pull request #7022: [AIRFLOW-6385] BugFix:
SlackAPIPostOperator fails when blocks not set
URL: https://github.com/apache/airflow/pull/7022
**Issue**:
After upgrade to 1.10.7 all slack notifications became faulty
SlackAPIPostOperator fails when blocks not set
```python
t_slack_ok = SlackAPIPostOperator(
task_id = 'notify_ok',
token = Variable.get('slack.token'),
channel = Variable.get('slack.channel'),
text = ':rocket: {{ dag.dag_id }} for {{ ds }} has succeeded',
dag = dag)
```
Causing an operator error:
```
[2019-12-28 21:55:14,668] {taskinstance.py:1088} ERROR - Slack API call
failed (invalid_blocks_format)
Traceback (most recent call last):
File
"/usr/local/lib/python3.6/dist-packages/airflow/models/taskinstance.py", line
955, in _run_raw_task
result = task_copy.execute(context=context)
File
"/usr/local/lib/python3.6/dist-packages/airflow/operators/slack_operator.py",
line 85, in execute
slack.call(self.method, self.api_params)
File "/usr/local/lib/python3.6/dist-packages/airflow/hooks/slack_hook.py",
line 62, in call
raise AirflowException(msg)
```
**Fix**:
It is because the default value is None and `json.dumps(None)` is null
which is not valid for Slack message
---
Link to JIRA issue: https://issues.apache.org/jira/browse/AIRFLOW-6385
- [x] Description above provides context of the change
- [x] Commit message starts with `[AIRFLOW-NNNN]`, where AIRFLOW-NNNN = JIRA
ID*
- [x] Unit tests coverage for changes (not needed for documentation changes)
- [x] Commits follow "[How to write a good git commit
message](http://chris.beams.io/posts/git-commit/)"
- [x] Relevant documentation is updated including usage instructions.
- [x] I will engage committers as explained in [Contribution Workflow
Example](https://github.com/apache/airflow/blob/master/CONTRIBUTING.rst#contribution-workflow-example).
(*) For document-only changes, no JIRA issue is needed. Commit message
starts `[AIRFLOW-XXXX]`.
---
In case of fundamental code change, Airflow Improvement Proposal
([AIP](https://cwiki.apache.org/confluence/display/AIRFLOW/Airflow+Improvements+Proposals))
is needed.
In case of a new dependency, check compliance with the [ASF 3rd Party
License Policy](https://www.apache.org/legal/resolved.html#category-x).
In case of backwards incompatible changes please leave a note in
[UPDATING.md](https://github.com/apache/airflow/blob/master/UPDATING.md).
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> SlackAPIPostOperator fails when blocks not set
> ----------------------------------------------
>
> Key: AIRFLOW-6385
> URL: https://issues.apache.org/jira/browse/AIRFLOW-6385
> Project: Apache Airflow
> Issue Type: Bug
> Components: operators
> Affects Versions: 1.10.7
> Reporter: Dmytro Kulyk
> Assignee: Kaxil Naik
> Priority: Critical
> Labels: slack
> Fix For: 1.10.8
>
>
> After upgrade to 1.10.7 all slack notifications became faulty
> SlackAPIPostOperator fails when blocks not set
> {code}
> t_slack_ok = SlackAPIPostOperator(
> task_id = 'notify_ok',
> token = Variable.get('slack.token'),
> channel = Variable.get('slack.channel'),
> text = ':rocket: {{ dag.dag_id }} for {{ ds }} has succeeded',
> dag = dag)
> {code}
> Causing an operator error:
> {code}
> [2019-12-28 21:55:14,668] {taskinstance.py:1088} ERROR - Slack API call
> failed (invalid_blocks_format)
> Traceback (most recent call last):
> File
> "/usr/local/lib/python3.6/dist-packages/airflow/models/taskinstance.py", line
> 955, in _run_raw_task
> result = task_copy.execute(context=context)
> File
> "/usr/local/lib/python3.6/dist-packages/airflow/operators/slack_operator.py",
> line 85, in execute
> slack.call(self.method, self.api_params)
> File "/usr/local/lib/python3.6/dist-packages/airflow/hooks/slack_hook.py",
> line 62, in call
> raise AirflowException(msg)
> {code}
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