ubuntu下，表单不能保存，而其它如视图等都正常

ubuntu 12.04，mysql 5.1.63，tomcat6。表单不能保存，而其它如视图等正常。
/var/log/tomcat6/catalina.out 中如下：

Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 1,340,385,727,464 milliseconds ago.  The last packet sent successfully to the server was 0 milliseconds ago.
        at sun.reflect.GeneratedConstructorAccessor59.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:532)
        at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
        at com.mysql.jdbc.SQLError.createCommunicationsException(SQLError.java:1074)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:341)
        at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2137)
        ... 107 more
Caused by: java.net.ConnectException: Connection refused
        at java.net.PlainSocketImpl.socketConnect(Native Method)
        at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:327)
        at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:193)
        at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:180)
        at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:384)
        at java.net.Socket.connect(Socket.java:546)
        at java.net.Socket.connect(Socket.java:495)
        at java.net.Socket.<init>(Socket.java:392)
        at java.net.Socket.<init>(Socket.java:235)
        at com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:253)
        at com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:290)
        ... 108 more

您好，根据您截取出来的错误是因为您的的数据库连接不成功。麻烦检查下您软件基本信息那里的数据源数据库连接是否正常。

谢谢，果然是软件的数据库没有设置，原以为是ubuntu和mysql版本问题，浪费了很多时间。

，问题解决了就好，感谢楼主的通知。