springboot使用jpa,删除功能sql报错解决

springboot使用jpa时报错:

 只有删除时报错了,

"data": "删除失败,原因:Could not open JPA EntityManager for transaction; nested exception is javax.persistence.PersistenceException: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure\n\nThe last packet successfully received from the server was 190,731 milliseconds ago. The last packet sent successfully to the server was 4 milliseconds ago.",
"success": false

 

解决方案:增加了配置:&failOverReadOnly=false

springboot使用jpa,删除功能sql报错解决_第1张图片

 

对应中文环境,通常mysql连接URL可以设置为:
jdbc:mysql://localhost:3306/test?user=root&password=&useUnicode=true&characterEncoding=gbk&autoReconnect=true&failOverReadOnly=false

在使用数据库连接池的情况下,最好设置如下两个参数:
autoReconnect=true&failOverReadOnly=false

 

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