NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1137) at com.mysql.jdbc.MysqlIO.(MysqlIO.java:355) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2490) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2527) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2309) at com.mysql.jdbc.ConnectionImpl.(ConnectionImpl.java:834) at com.mysql.jdbc.JDBC4Connection.(JDBC4Connection.java:46) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) at java.lang.reflect.Constructor.newInstance(Unknown Source) at com.mysql.jdbc.Util.handleNewInstance(Util.java:408) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:419) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344) at java.sql.DriverManager.getConnection(Unknown Source) at java.sql.DriverManager.getConnection(Unknown Source) at mondrianTest.TestMysql.main(TestMysql.java:17) Caused by: java.net.ConnectException: Connection refused: connect at java.net.DualStackPlainSocketImpl.connect0(Native Method) at java.net.DualStackPlainSocketImpl.socketConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.doConnect(Unknown Source) at java.net.AbstractPlainSocketImpl.connectToAddress(Unknown Source) at java.net.AbstractPlainSocketImpl.connect(Unknown Source) at java.net.PlainSocketImpl.connect(Unknown Source) at java.net.SocksSocketImpl.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.connect(Unknown Source) at java.net.Socket.(Unknown Source) at java.net.Socket.(Unknown Source) at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:258) at com.mysql.jdbc.MysqlIO.(MysqlIO.java:305) ... 15 more
这个错误从堆栈上看是connect引起的，通过http://stackoverflow.com/questions/2983248/com-mysql-jdbc-exceptions-jdbc4-communicationsexception-communications-link-fai的解析发现时由于没连上服务器导致的，但是明明服务器的3306端口已经打开了啊，而且在服务器上使用mysql客户端就可以连接上去啊。这是怎么回事，使用tcpdump抓包发现每一次SYN请求都会被服务器无情的回复RST报文，这说明该端口确实没有打开，使用netstat查看该端口发现的确：


原来服务器只接收本地的连接，怪不得我在windows上一直连不上呢，解决的方法就是修改mysql的配置文件my.conf，把其中的bind-address从原来的127.0.0.1修改为0.0.0.0，这样就可以从远程连接到mysql了。 接着重新运行又出现这样的错误：

Exception in thread "main" mondrian.olap.MondrianException: Mondrian Error:Failed to parse query 'select {[Measures].[业务量]} on columns from MsgBusi'
at mondrian.resource.MondrianResource$_Def0.ex(MondrianResource.java:755)
at mondrian.olap.ConnectionBase.parseQuery(ConnectionBase.java:77)
at mondrian.olap.ConnectionBase.parseQuery(ConnectionBase.java:59)
at mondrianTest.TestMDX.testQuery(T