[
https://issues.apache.org/jira/browse/AIRFLOW-6208?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16992122#comment-16992122
]
ASF GitHub Bot commented on AIRFLOW-6208:
-----------------------------------------
konqui0 commented on pull request #6767: [AIRFLOW-6208] Implement fileno in
StreamLogWriter
URL: https://github.com/apache/airflow/pull/6767
### Jira
- [X] My PR addresses the following [Airflow
Jira](https://issues.apache.org/jira/browse/AIRFLOW-6208) issues and references
them in the PR title.
### Description
- [X] Here are some details about my PR, including screenshots of any UI
changes:
Tasks running with the python operator using subprocess.run fail when stdout
is redirected to sys.stdout as the StreamLogWriter class does not implement the
file descriptor return function fileno()
`import sys
import os
subprocess.run("echo 1", shell=True, check=True, stdout=sys.stdout,
stderr=sys.stderr)`
`Traceback (most recent call last):
File "/usr/lib/python3.8/site-packages/airflow/models/taskinstance.py",
line 930, in _run_raw_task
result = task_copy.execute(context=context)
File
"/usr/lib/python3.8/site-packages/airflow/operators/python_operator.py", line
113, in execute
return_value = self.execute_callable()
File
"/usr/lib/python3.8/site-packages/airflow/operators/python_operator.py", line
118, in execute_callable
return self.python_callable(*self.op_args, **self.op_kwargs)
File "/home/sahas/airflow/dags/subprocess.py", line 39, in sp
subprocess.run("echo 1", shell=True, check=True, stdout=sys.stdout,
stderr=sys.stderr)
File "/usr/lib/python3.8/subprocess.py", line 489, in run
with Popen(*popenargs, **kwargs) as process:
File "/usr/lib/python3.8/subprocess.py", line 804, in __init__
errread, errwrite) = self._get_handles(stdin, stdout, stderr)
File "/usr/lib/python3.8/subprocess.py", line 1487, in _get_handles
c2pwrite = stdout.fileno()
AttributeError: 'StreamLogWriter' object has no attribute 'fileno'`
### Tests
- [X] My PR adds the following unit tests:
Added:
test_fileno in file tests/utils/test_logging_mixin.py
### 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.
- All the public functions and the classes in the PR contain docstrings
that explain what it does
- If you implement backwards incompatible changes, please leave a note in
the [Updating.md](https://github.com/apache/airflow/blob/master/UPDATING.md) so
we can assign it to a appropriate release
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> StreamLogWriter class does not implement file fileno() function, preventing
> output redirection to stdout with the python subprocess module
> ------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: AIRFLOW-6208
> URL: https://issues.apache.org/jira/browse/AIRFLOW-6208
> Project: Apache Airflow
> Issue Type: Bug
> Components: logging
> Affects Versions: 1.10.6
> Environment: Archlinux python 3.8 Linux 5.4
> Also affects airflow breeze python 3.6 docker development environment
> Reporter: Sahas L
> Assignee: Sahas L
> Priority: Major
>
> When using the python operator to execute a callbackfunction which makes use
> of the subprocess module stdout redirection to system stdout, the task fails
> due to fileno() being unimplemented in airflow/utils/log/logging_mixin.py
> class StreamLogWriter.
> {code:java}
> Traceback (most recent call last):
> File "/usr/lib/python3.8/site-packages/airflow/models/taskinstance.py",
> line 930, in _run_raw_task
> result = task_copy.execute(context=context)
> File
> "/usr/lib/python3.8/site-packages/airflow/operators/python_operator.py", line
> 113, in execute
> return_value = self.execute_callable()
> File
> "/usr/lib/python3.8/site-packages/airflow/operators/python_operator.py", line
> 118, in execute_callable
> return self.python_callable(*self.op_args, **self.op_kwargs)
> File "/home/sahas/airflow/dags/subprocess.py", line 39, in sp
> subprocess.run("echo 1", shell=True, check=True, stdout=sys.stdout,
> stderr=sys.stderr)
> File "/usr/lib/python3.8/subprocess.py", line 489, in run
> with Popen(*popenargs, **kwargs) as process:
> File "/usr/lib/python3.8/subprocess.py", line 804, in __init__
> errread, errwrite) = self._get_handles(stdin, stdout, stderr)
> File "/usr/lib/python3.8/subprocess.py", line 1487, in _get_handles
> c2pwrite = stdout.fileno()
> AttributeError: 'StreamLogWriter' object has no attribute 'fileno'
> {code}
> The code in the callback function is:
> {code:java}
> import sys
> import os
> subprocess.run("echo 1", shell=True, check=True, stdout=sys.stdout,
> stderr=sys.stderr)
> {code}
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