记录整合ssm框架是使用c3p0连接池连接数据库出错
2020-06-26 11:36:17,509 43895 WARN resourcepool.BasicResourcePool - com.mchange.v2.resourcepool.BasicResourcePool$AcquireTask@5d5108d9 -- Acquisition Attempt Failed!!! Clearing pending acquires. While trying to acquire a needed new resource, we failed to succeed more than the maximum number of allowed acquisition attempts (30). Last acquisition attempt exception:
java.sql.SQLException: Unknown system variable 'tx_isolation'
目前仍未解决，记录一下
