我有一台带有倍数系统的服务器。 应用程序在java中，DB是sql服务器。
当我点击访问系统时，他在屏幕上打印了这个例外：
java.sql.SQLException: Invalid state, the Connection object is closed. at
net.sourceforge.jtds.jdbc.TdsCore.checkOpen(TdsCore.java:452) at
net.sourceforge.jtds.jdbc.TdsCore.clearResponseQueue(TdsCore.java:727) at
net.sourceforge.jtds.jdbc.TdsCore.executeSQL(TdsCore.java:951) at
net.sourceforge.jtds.jdbc.MSCursorResultSet.cursorFetch(MSCursorResultSet.java:698) at
net.sourceforge.jtds.jdbc.MSCursorResultSet.next(MSCursorResultSet.java:1137) at
wfr.com.WFRDBSystem.createFormList(WFRDBSystem.java:225) at
wfr.com.WFRSystem.loadSystem(WFRSystem.java:2138) at
wfr.com.WFRSystem.create(WFRSystem.java:794) at
wfr.com.WFRSystem.create(WFRSystem.java:687) at wfr.com.WFRDBSystem.(WFRDBSystem.java:41)
at wfr.com.WFRSystem.getInstance(WFRSystem.java:297) at
wfr.com.WFRSystem.getInstance(WFRSystem.java:262) at wfr.sys.WFR.(WFR.java:23) at
wfr.sys.WFRLoader.createSystem(WFRLoader.java:150) at
wfr.sys.WFRLoader.getWFR(WFRLoader.java:139) at
wfr.sys.HTMLInterface.HTMLInterface.getInstance(HTMLInterface.java:143) at
wfr.sys.HTMLInterface.HTMLInterface.getInstance(HTMLInterface.java:129) at
wfr.sys.HTMLInterface.HTMLInterface.getInstance(HTMLInterface.java:125) at wfr.web.Action.
(Action.java:88) at wfr.web.Action.(Action.java:68) at wfr.web.actions.OpenAction.
(OpenAction.java:30) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native
Method) at
sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39
) at
sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl
.java:27) at java.lang.reflect.Constructor.newInstance(Constructor.java:494) at
wfr.web.ActionFactory.getAction(ActionFactory.java:72) at
wfr.web.Controller.process(Controller.java:99) at
wfr.web.Controller.doGet(Controller.java:57) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:617) at
javax.servlet.http.HttpServlet.service(HttpServlet.java:717) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.jav
a:290) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at wfr.web.ContextFilter.doFilter(ContextFilter.java:86) at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.jav
a:235) at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233) at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191) at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:433) at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128) at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102) at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109) at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286) at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845) at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java
:583) at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447) at
java.lang.Thread.run(Thread.java:595)
我尝试禁用防火墙并重新启动数据库用户的passwd。
你们可以帮我脱掉这条甘道夫吗？ TY