java.sql.SQLException: validateConnection false 多数据源连接问题解决

1、场景

项目中需要直连多个数据源，mysql可以，但是sqlserver提示错误

2、问题描述

16:49:59.835 [Druid-ConnectionPool-Create-329645619] ERROR com.alibaba.druid.pool.DruidDataSource - create connection SQLException, url: jdbc:sqlserver://127.0.0.1:1433;DatabaseName=test, errorCode 0, state null
java.sql.SQLException: validateConnection false
        at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1418)
        at com.alibaba.druid.pool.DruidAbstractDataSource.createPhysicalConnection(DruidAbstractDataSource.java:1733)
        at com.alibaba.druid.pool.DruidDataSource$CreateConnectionThread.run(DruidDataSource.java:2801)
Caused by: java.lang.NullPointerException: null
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.ensureSQLSyntax(SQLServerStatement.java:778)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.doExecuteStatement(SQLServerStatement.java:822)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement$StmtExecCmd.doExecute(SQLServerStatement.java:767)
        at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:7418)
        at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:3272)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:247)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:222)
        at com.microsoft.sqlserver.jdbc.SQLServerStatement.execute(SQLServerStatement.java:743)
        at com.alibaba.druid.pool.vendor.MSSQLValidConnectionChecker.isValidConnection(MSSQLValidConnectionChecker.java:50)
        at com.alibaba.druid.pool.DruidAbstractDataSource.validateConnection(DruidAbstractDataSource.java:1398)
        ... 2 common frames omitted

3、原因

Druid 与 sqlserver 驱动不兼容

4、依赖

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.6.6</version>
        <relativePath/>
    </parent>

    <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>com.microsoft.sqlserver</groupId>
            <artifactId>mssql-jdbc</artifactId>
            <scope>runtime</scope>
        </dependency>
     <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid-spring-boot-starter</artifactId>
            <version>1.2.8</version>
        </dependency>
       <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>5.1.47</version>
        </dependency>

5、解决办法

将druid-spring-boot-starter升级，1.2.8->1.2.9或更新