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https://issues.apache.org/jira/browse/AIRFLOW-2707?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16531951#comment-16531951
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Yuri Bendana commented on AIRFLOW-2707:
---------------------------------------

I had the same problem in part because I was using the 2.0 (master) version of 
the log config file.  Copy the 
airflow/config_templates/airflow_local_settings.py to AIRFLOW_HOME/config and 
add an __init__.py.  Then in airflow.cfg set 
logging_config_class=airflow_local_settings.DEFAULT_LOGGING_CONFIG and 
task_log_reader=file.task.

> Error accessing log files from web UI
> -------------------------------------
>
>                 Key: AIRFLOW-2707
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-2707
>             Project: Apache Airflow
>          Issue Type: Bug
>    Affects Versions: 1.9.0, Airflow 1.9.0
>         Environment: Debian
>            Reporter: Victor Martin
>            Priority: Major
>         Attachments: Captura de pantalla 2018-07-02 a las 11.10.33.png
>
>
> After upgrading from Airflow v1.8 to v1.9, local log files are not shown 
> anymore on the web UI.
>  
> This is the error shown when clicking to "Log" button on a task instance 
> details (see attached screenshot):
>  
> {code:java}
> Task log handler task does not support read logs. 'NoneType' object has no 
> attribute 'read'{code}
>  
> I've checked the local filesystem are logs are generated as expected on 
> $AIRFLOW_HOME/logs.
>  
> Other than configuring celery and postgresql, I'm with default 1.9 airflow.cfg



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