Why did spring fail to automatically match fields?

Why did spring fail to automatically match fields?
Wechat"s front end reads as follows:

Java:

Webapi spring-mvc spring java
Feb.26,2021

@ Requestbody add this note

if you put it in body.

set 

contentType:"application/json;charset=utf-8",
(@Requestbody  Auth auth)

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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-64f5-1e77fad-4db6d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1e77fad-4db6d.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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