[Communications link failure] Mysql/jdbc connection failed

Bonjour,

Je reviens sur un éternel problème^^ J'ai parcouru le forum, beaucoup de messages à ce sujet mais pas de solution me concernant...
J'ai aujourd'hui ce bug de façon aléatoire (plusieures connections simultanées par exemple) que je n'arrive pas à m'expliquer...
Config : mysql4.1.12, mysqlconnector-5.1.6 et commonsdbcp-1.2.2

Mon url a bien le paramètre autoReconnect=true

Code:

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com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure
 
Last packet sent to the server was 0 ms ago.
	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:406)
	at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2985)
	at com.mysql.jdbc.MysqlIO.reuseAndReadPacket(MysqlIO.java:2871)
	at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3414)
	at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
	at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
	at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2542)
	at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1734)
	at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1885)
	at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:93)

Init de mon datasource :

Code:

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private static DataSource setupDataSource(String connectURI, Properties p) {
    try {
      Class.forName("com.mysql.jdbc.Driver");
    } catch (ClassNotFoundException e) {
      LOGGER.warn("ex:", e);
    }
    //
    // First, we'll need a ObjectPool that serves as the
    // actual pool of connections.
    //
    // We'll use a GenericObjectPool instance, although
    // any ObjectPool implementation will suffice.
    //
    ObjectPool connectionPool = new GenericObjectPool(null);
    //
    // Next, we'll create a ConnectionFactory that the
    // pool will use to create Connections.
    // We'll use the DriverManagerConnectionFactory,
    // using the connect string passed in the command line
    // arguments.
    //
    //ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(connectURI, uname, passwd);
    ConnectionFactory connectionFactory = new DriverManagerConnectionFactory(connectURI, p);
    //
    // Now we'll create the PoolableConnectionFactory, which wraps
    // the "real" Connections created by the ConnectionFactory with
    // the classes that implement the pooling functionality.
    //
    PoolableConnectionFactory poolableConnectionFactory = new PoolableConnectionFactory(connectionFactory, connectionPool, null, null, false, true);
    //
    // Finally, we create the PoolingDriver itself,
    // passing in the object pool we created.
    //
    PoolingDataSource dataSource = new PoolingDataSource(connectionPool);
 
    return dataSource;
  }

A chaque utilisation :
con = ds.getConnection()
con.close();

Dois-je fermer ma connection à chaque fois ?

Merci pour toute aide !