Airflow (Google Composer) TypeError: can't pickle _thread.RLock objects
问题 I'm using airflow(Google composer), but experienced some exceptions below TypeError: can't pickle _thread.RLock objects Ooops. ____/ ( ( ) ) \___ /( ( ( ) _ )) ) )\ (( ( )( ) ) ( ) ) ((/ ( _( ) ( _) ) ( () ) ) ( ( ( (_) (( ( ) .((_ ) . )_ ( ( ) ( ( ) ) ) . ) ( ) ( ( ( ( ) ( _ ( _) ). ) . ) ) ( ) ( ( ( ) ( ) ( )) ) _)( ) ) ) ( ( ( \ ) ( (_ ( ) ( ) ) ) ) )) ( ) ( ( ( ( (_ ( ) ( _ ) ) ( ) ) ) ( ( ( ( ( ) (_ ) ) ) _) ) _( ( ) (( ( )( ( _ ) _) _(_ ( (_ ) (_((__(_(__(( ( ( | ) ) ) )_))__))_)___) ((