ERROR - Cannot create PoolableConnectionFactory (Communication failure during handshake. Is there a server running on localhost:3306?)
WARN - Could not obtain connection metadata
org.apache.commons.dbcp.SQLNestedException: Cannot create PoolableConnectionFactory (Communication failure during handshake. Is there a server running on localhost:3306?)
PoolableConnectionFactory 建立不了,是不是3306端口被用了,你是不是数据库已经开了一个什么,用了3306的端口
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