nested exception is com.mysql.jdbc.PacketTooBigException: Packet for query is too large (1109 1024

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MySQL的一个系统参数：max_allowed_packet

>mysql -u root -p //root登录

1. 查看系统参数：show VARIABLES like '%max_allowed_packet%'

2. 设置系统参数：set global max_allowed_packet = 2*1024*1024*10;