java.sql.SQLException: Io 异常: Socket closed

Struts+Hibernate+Spring开发的，数据库是Oracle，服务器resin
500 Servlet Exception
java.sql.SQLException: Io 异常: Socket closed
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:124)
at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:161)
at oracle.jdbc.driver.T4CPreparedStatement.execute_for_describe(T4CPreparedStatement.java:511)
at oracle.jdbc.driver.OracleStatement.execute_maybe_describe(OracleStatement.java:941)
at oracle.jdbc.driver.T4CPreparedStatement.execute_maybe_describe(T4CPreparedStatement.java:531)
at oracle.jdbc.driver.OraclePreparedStatement.executeQuery(OraclePreparedStatement.java:2945)
at org.apache.commons.dbcp.DelegatingPreparedStatement.executeQuery(DelegatingPreparedStatement.java:92)
at org.hibernate.id.SequenceGenerator.generate(SequenceGenerator.java:75)
at org.hibernate.event.def.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:85)

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我也遇到了 当点击一个可能查询加载慢的晌咐页面 连续点击几次后就socket关闭，然后出现返回空值等等问题，但是奇怪的是，过一段时间再刷新时，又正常了，再这样刷几次，又出同样的问题，
我是数据量有600W，查询sql慢使得页面加载慢，连续刷激谨培新就socket关闭，目前想到的就是让他不连续刷新那明唯么快，完成一次连接后再去连接。

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Socket closed

套接字关闭啊... 是你连数据库的问题

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