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https://issues.apache.org/jira/browse/AIRFLOW-1562?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Bolke de Bruin resolved AIRFLOW-1562.
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Resolution: Fixed
> Spark-sql deadlock in logging
> -----------------------------
>
> Key: AIRFLOW-1562
> URL: https://issues.apache.org/jira/browse/AIRFLOW-1562
> Project: Apache Airflow
> Issue Type: Bug
> Components: hooks
> Affects Versions: Airflow 1.8
> Reporter: Fokko Driesprong
> Fix For: 1.8.3
>
>
> Related to Issue 1255
> Logging in SparkSqlOperator does not work as intended (continuous logging as
> received in the subprocess). This is because, spark-sql internally redirects
> all logs to stdout (including stderr), which causes the current two iterator
> logging to get stuck with empty stderr pipe. Also this situation can lead to
> a deadlock because the std-err can grow too big and it will start to block
> until it gets consumed, which will only happen when the process ends, so the
> process stalls.
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