### Error querying database. Cause: com.mysql.cj.jdbc.exceptions.PacketTooBigException

 

### Error querying database. Cause: com.mysql.cj.jdbc.exceptions.PacketTooBigException: Packet for query is too large (1,204 > 1,024). You can change this value on the server by setting the 'max_allowed_packet' variable. ### The error may exist in org/springblade/modules/sun/mapper/NewsMapper.java (best guess) ### The error may involve defaultParameterMap ### The error occurred while setting parameters ### SQL: SELECT id, is_First, content_url, see_flag, content_detail, thumb_url, title FROM news LIMIT ?,? ### Cause: com.mysql.cj.jdbc.exceptions.PacketTooBigException: Packet for query is too large (1,204 > 1,024). You can change this value on the server by setting the 'max_allowed_packet' variable. ; Packet for query is too large (1,204 > 1,024). You can change this value on the server by setting the 'max_allowed_packet' variable.; nested exception is com.mysql.cj.jdbc.exceptions.PacketTooBigException: Packet for query is too large (1,204 > 1,024). You can change this value on the server by setting the 'max_allowed_packet' variable.

针对此情况下，可以在mysql如下操作：

set global mysqlx_max_allowed_packet =2*1024*1024*10（20M）

set global max_allowed_packet =2*1024*1024*10

show VARIABLES like '%max_allowed_packet%';

特别提醒：在springboot中可能存在多个数据库配置问题，建议第一次先排查下自己所连的数据库是否是自己想要的那个数据库。