C3p0Plugin c3p0Plugin = new C3p0Plugin(getProperty("sqlserver.jdbcUrl"), getProperty("sqlserver.userName"),
                getProperty("sqlserver.passWord"), getProperty("sqlserver.driverClass"));
        c3p0Plugin.setMaxPoolSize(2);
        c3p0Plugin.setInitialPoolSize(1);
        c3p0Plugin.setAcquireIncrement(20);

用的是sqlserver，上面配置后面log显示

结果tomcat直接就崩了