### Error updating database. Cause: com.mysql.jdbc.exceptions.jdbc4.MySQLTransactionRollbackException: Deadlock found when trying to get lock; try restarting transaction
### The error may involve
解决办法：
参考文档：http://blog.sina.com.cn/s/blog_4acbd39c01014gsq.html
https://blog.csdn.net/aesop_wubo/article/details/8286215
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