Centos 7 vsftp sets passive mode and enables relevant port mapping, but still cannot use passive mode

centos 7 vsftp sets passive mode and enables relevant port mapping, but still cannot use passive mode

pasv_enable=YES
pasv_min_port=30000
pasv_max_port=30010

when using a client like fileZilla, the status disconnects when it reaches PASV

what is the general way to debug in a situation like this?

Vsftpd

Mar.05,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1e55527-598ab.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e55527-598ab.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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