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https://issues.apache.org/jira/browse/AIRFLOW-1583?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Daniel Imberman closed AIRFLOW-1583.
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    Resolution: Fixed

> PostgreSQL error when pushing a value bigger than 1GB
> -----------------------------------------------------
>
>                 Key: AIRFLOW-1583
>                 URL: https://issues.apache.org/jira/browse/AIRFLOW-1583
>             Project: Apache Airflow
>          Issue Type: Bug
>          Components: xcom
>    Affects Versions: 1.7.0, 1.8.0
>            Reporter: Rémy Frenoy
>            Assignee: Rémy Frenoy
>            Priority: Minor
>   Original Estimate: 0.25h
>  Remaining Estimate: 0.25h
>
> When a task Operator or a PythonOperator returns a value, this value is 
> automatically pushed to XCom. This results in a postgresql error when the 
> value is bigger than 1GB :
> ERROR:  invalid memory alloc request size 1073741824
> A size limit could be added on the value size in the xcom-push() function in 
> model.py. When value is higher than the limit size, a default value (maybe a 
> string explaining that the initial value was too high to be saved) could be 
> pushed to XCom instead of the real one, avoiding the postgresql error.



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