java.sql.SQLException: Io 異常: Got minus one from a read call

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:111)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:145)

at oracle.jdbc.driver.DatabaseError.throwSqlException(DatabaseError.java:254)

at oracle.jdbc.driver.T4CConnection.logon(T4CConnection.java:386)

at oracle.jdbc.driver.PhysicalConnection.(PhysicalConnection.java:413)

at oracle.jdbc.driver.T4CConnection.(T4CConnection.java:164)

at oracle.jdbc.driver.T4CDriverExtension.getConnection(T4CDriverExtension.java:34)

at oracle.jdbc.driver.OracleDriver.connect(OracleDriver.java:752)

at java.sql.DriverManager.getConnection(DriverManager.java:525)

at java.sql.DriverManager.getConnection(DriverManager.java:171)

at com.org.vdis.UpdateLicense.UpdateLicenseId(UpdateLicense.java:122)

at com.org.vdis.UpdateLicense.GetOldLicenseid(UpdateLicense.java:36)

at com.org.vdis.UpdateLicense.Update(UpdateLicense.java:14)

at com.org.vdis.Update.onClick$LicenseID(Update.java:16)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:585)

at org.zkoss.zk.ui.impl.EventProcessor.process0(EventProcessor.java:211)

at org.zkoss.zk.ui.impl.EventProcessor.process(EventProcessor.java:143)

at org.zkoss.zk.ui.impl.EventProcessingThreadImpl.process0(EventProcessingThreadImpl.java:485)

at org.zkoss.zk.ui.impl.EventProcessingThreadImpl.run(EventProcessingThreadImpl.java:419)

不知道為什么報這樣的錯誤,但是程序還可以繼續運行。再網上搜索之后說數據庫連接不夠,但是使用了連接池還是有問題,想問一下出現這樣的問題一般是什么情況？ 程序里面需要關閉的連接都關閉了的

程序實現的功能是

while(rs.next())

{

//在這里調用另一個方法修改數據?,不知道是不是因為嵌套了的原因？

}