thanks for your quick response. 
found it on [AIRFLOW-661] Celery Task Result Expiry - ASF JIRA

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[AIRFLOW-661] Celery Task Result Expiry - ASF JIRA


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It looks like the fix has not been released.



    On Wednesday, April 1, 2020, 12:28:00 PM EDT, Kamil Breguła 
<kamil.breg...@polidea.com> wrote:  
 
 Hello,

I am not sure, but please look at this configuration option. This is
probably the solution to your problem
https://airflow.readthedocs.io/en/latest/configurations-ref.html#celery-config-options

Best regards,
Kamil

On Wed, Apr 1, 2020 at 5:43 PM heng gu <heng...@yahoo.com.invalid> wrote:
>
> I am using Celery Executor with RabbitMQ and PostgreSQL database backend. The 
> celery_taskmeta table never got automatically cleaned by Airflow. In Celery 
> configuration, you can set  CELERY_TASK_RESULT_EXPIRES, but I cannot find it 
> in airflow.cfg or in other config templates. Does anybody know how to set it?
> Thanks,  

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