今天部署项目遇到一个大坑，调试了一天，最后终于解决。
项目开发框架：spring boot
应用服务器环境：windows server 2012
数据库环境：MS SQL server 2014 端口：1444
连接池：druid
症状：连接数据库报地址端口冲突
com.microsoft.sqlserver.jdbc.SQLServerException: The TCP/IP connection to the host 10.1.12.2, port 1444 has failed. Error: "Address already in use: no further information. Verify the connection properties. Make sure that an instance of SQL Server is running on the host and accepting TCP/IP connections at the port. Make sure that TCP connections to the port are not blocked by a firewall.".
at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDriverError(SQLServerException.java:206)
at com.microsoft.sqlserver.jdbc.SQLServerException.ConvertConnectExceptionToSQLServerException(SQLServerException.java:257)
at com.microsoft.sqlserver.jdbc.SocketFinder.findSocket(IOBuffer.java:2385)
at com.microsoft.sqlserver.jdbc.TDSChannel.open(IOBuffer.java:567)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectHelper(SQLServerConnection.java:1955)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.login(SQLServerConnection.java:1616)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connectInternal(SQLServerConnection.java:1447)
at com.microsoft.sqlserver.jdbc.SQLServerConnection.connect(SQLServerConnection.java:788)
at com.microsoft.sqlserver.jdbc.SQLServerDriver.connect(SQLServerDriver.java:1187)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:149)
at com.alibaba.druid.filter.FilterAdapter.connection_connect(FilterAdapter.java:786)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:143)
at com.alibaba.druid.filter.stat.StatFilter.connection_connect(StatFilter.java:218)
at com.alibaba.druid.filter.FilterChainImpl.connection_connect(FilterChainImpl.java:143)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1466)
at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1529)
at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2277)原因：在某些情况下（说不清什么情况，在开发环境下运行没问题，在生产的云服务器上就报错）， Druid连接池的test属性会造成多次连接，使数据库端口堵死
解决方法：
在Druid的配置文件中将test相关属性设为false即可。
如图，将箭头所指值设为false
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