mysql Packet for query is too large (2036 > 1024). You can change this value on the server by setting the max_allowed_packet' variable.
解决方法：
打开控制台，输入下面语句，执行
set global max_allowed_packet = 20*1024*1024;
网上说要重启 mysql server， 我是执行完后不用重启就可以了。如果不行的请连到 数据库服务器重启服务
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