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https://issues.apache.org/jira/browse/AIRFLOW-1745?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16213742#comment-16213742
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William Pursell commented on AIRFLOW-1745:
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Also, see
https://stackoverflow.com/questions/22077881/yes-reporting-error-with-subprocess-communicate
and
https://stackoverflow.com/questions/23064636/python-subprocess-popen-blocks-with-shell-and-pipe/23089677#23089677
It's not clear to me if signals other than SIGPIPE need be reset.
> BashOperator ignores SIGPIPE in subprocess
> ------------------------------------------
>
> Key: AIRFLOW-1745
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1745
> Project: Apache Airflow
> Issue Type: Bug
> Components: DagRun
> Affects Versions: Airflow 1.8
> Reporter: William Pursell
> Assignee: William Pursell
> Original Estimate: 10m
> Remaining Estimate: 10m
>
> In Python 2, subprocesses ignore SIGPIPE (https://bugs.python.org/issue1652).
> As a result, a simple bash operator with bash_command = 'yes | head' may
> never terminate (depending on the implementation of yes). Airflow should
> reset the signal disposition to default.
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