coolacid commented on issue #16271:
URL: https://github.com/apache/airflow/issues/16271#issuecomment-854878015


   Docker entrypoint uses netcat to check for an open port:
   
   
https://github.com/apache/airflow/blob/main/scripts/in_container/prod/entrypoint_prod.sh#L128
   
   This is where the extra error reading communication packets are coming from. 
This should be changed to a mysql command similar to: 
   
   `echo "SHOW STATUS" | mysql -u $MYSQL_USER -p$MYSQL_PASSWORD -P $MYSQL_PORT 
-h $MYSQL_HOST -r -N  $MYSQL_DATABASE 1>/dev/null`


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