Java和MySql連接問題

我正在使用Java + MySql。我正在嘗試添加批量數據（大約4000萬條記錄）。我的應用程序工作正常，幾百上千的記錄，但之後它開始給我下面的異常：Java和MySql連接問題

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了這個問題，並試圖幾乎每一個選項（更新Windows註冊表，更改my.cnf文件，改變MySQL的全球參數等），但不起作用。

來源

2011-05-17 user751637

請你可以隨意張貼你的jdbc驅動註冊碼 – developer 2011-05-17 06:00:18

請告訴我們你的代碼。我的猜測是，你打開每個記錄的連接，但忘記關閉它（你應該只打開一次，然後使用參數化查詢）。 – Bobby 2011-05-17 07:35:12