Java和MySql连接问题

我正在使用Java + MySql。我正在尝试添加批量数据（大约4000万条记录）。我的应用程序工作正常，几百上千的记录，但之后它开始给我下面的异常：Java和MySql连接问题

Exception in thread "main" com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure 

The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server. 
    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:411) 
    at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1116) 
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:344) 
    at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2333) 
    at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2370) 
    at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2154) 
    at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:792) 
    at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:47) 
    at sun.reflect.GeneratedConstructorAccessor5.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:411) 
    at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:381) 
    at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:305) 
    at java.sql.DriverManager.getConnection(Unknown Source) 
    at java.sql.DriverManager.getConnection(Unknown Source) 
    at net.jboss.Database.DatabaseConnection.getConnection(DatabaseConnection.java:48) 
    at net.jboss.emp.idm.adta(mde.java:96) 
    at net.jboss.emp.idm.main(mde.java:69) 
Caused by: java.net.SocketException: No buffer space available (maximum connections reached?): connect 
    at java.net.PlainSocketImpl.socketConnect(Native Method) 
    at java.net.PlainSocketImpl.doConnect(Unknown Source) 
    at java.net.PlainSocketImpl.connectToAddress(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.<init>(Unknown Source) 
    at java.net.Socket.<init>(Unknown Source) 
    at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:257) 
    at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:294) 
    ... 16 more

我GOOGLE了这个问题，并试图几乎每一个选项（更新Windows注册表，更改my.cnf文件，改变MySQL的全球参数等），但不起作用。

来源

2011-05-17 user751637

请你可以随意张贴你的jdbc驱动注册码 – developer 2011-05-17 06:00:18

请告诉我们你的代码。我的猜测是，你打开每个记录的连接，但忘记关闭它（你应该只打开一次，然后使用参数化查询）。 – Bobby 2011-05-17 07:35:12