小编use*_*559的帖子

我的简化代码（它表明连接因错误“IO 错误：套接字读取超时”而中断）：

    DriverManager.registerDriver(new oracle.jdbc.driver.OracleDriver());
    this.connection = DriverManager.getConnection("jdbc:oracle:thin:@", properties);
    while(isStarted){
        this.statement = this.connection.createStatement();
        ResultSet result = this.statement.executeQuery("select sysdate from dual");
        result.next();
        System.out.println("Sysdate: " + result.getString(1));
        result.close();
        this.statement.close();
        this.statement = null;
        TimeUnit.SECONDS.sleep(4);
    }
    this.connection.close();
    this.connection = null;

4-5 小时后，我发现：

 IO Error: Socket read timed out
    java.sql.SQLRecoverableException: IO Error: Socket read timed out
at oracle.jdbc.driver.T4CStatement.executeForDescribe(T4CStatement.java:886)
at oracle.jdbc.driver.OracleStatement.executeMaybeDescribe(OracleStatement.java:1167)
at oracle.jdbc.driver.OracleStatement.doExecuteWithTimeout(OracleStatement.java:1289)
at oracle.jdbc.driver.OracleStatement.executeQuery(OracleStatement.java:1491)
at oracle.jdbc.driver.OracleStatementWrapper.executeQuery(OracleStatementWrapper.java:406)

原因是什么？如何解决这个问题呢？