Org.apache.shiro.session.InvalidSessionException:java.lang.IllegalStateException:getAttribute:Session already Invalidated] with root cause

1. Encountered the following exception, looked for a long time, finally resolved, reported the exception as follows:

July 07, 2017 3:02:16 pm Org.apache.catalina.core.StandardWrapperValve invoke
Critical: Servlet.service () for Servlets [SPRINGMVC] in context with path [/imp] threw exception [Org.apache.shiro.session.Invali DSessionException:java.lang.IllegalStateException:getAttribute:Session already invalidated] with root cause
Java.lang.IllegalStateException:getAttribute:Session already invalidated
At Org.apache.catalina.session.StandardSession.getAttribute (standardsession.java:1190)
At Org.apache.catalina.session.StandardSessionFacade.getAttribute (standardsessionfacade.java:103)
At Org.apache.shiro.web.session.HttpServletSession.getAttribute (httpservletsession.java:146)
At Org.apache.shiro.session.ProxiedSession.getAttribute (proxiedsession.java:121)
At Org.apache.shiro.subject.support.DelegatingSubject.getRunAsPrincipalsStack (delegatingsubject.java:469)
At Org.apache.shiro.subject.support.DelegatingSubject.getPrincipals (delegatingsubject.java:153)
At Org.apache.shiro.subject.support.DelegatingSubject.getPrincipal (delegatingsubject.java:149)
At Org.apache.shiro.web.servlet.ShiroHttpServletRequest.getSubjectPrincipal (shirohttpservletrequest.java:95)
At Org.apache.shiro.web.servlet.ShiroHttpServletRequest.getUserPrincipal (shirohttpservletrequest.java:111)
At Org.springframework.web.servlet.FrameworkServlet.getUsernameForRequest (frameworkservlet.java:1079)
At Org.springframework.web.servlet.FrameworkServlet.publishRequestHandledEvent (frameworkservlet.java:1065)
At Org.springframework.web.servlet.FrameworkServlet.processRequest (frameworkservlet.java:996)
At Org.springframework.web.servlet.FrameworkServlet.doGet (frameworkservlet.java:852)
At Javax.servlet.http.HttpServlet.service (httpservlet.java:622)
At Org.springframework.web.servlet.FrameworkServlet.service (frameworkservlet.java:837)
At Javax.servlet.http.HttpServlet.service (httpservlet.java:729)
At Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:292)
At Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:207)
At Org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal (hiddenhttpmethodfilter.java:77)
At Org.springframework.web.filter.OncePerRequestFilter.doFilter (onceperrequestfilter.java:108)
At Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:240)
At Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:207)
At Org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter (proxiedfilterchain.java:61)
At Org.apache.shiro.web.servlet.AdviceFilter.executeChain (advicefilter.java:108)
At Org.apache.shiro.web.servlet.AdviceFilter.doFilterInternal (advicefilter.java:137)
At Org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter (onceperrequestfilter.java:125)
At Org.apache.shiro.web.servlet.ProxiedFilterChain.doFilter (proxiedfilterchain.java:66)
At Org.apache.shiro.web.servlet.AbstractShiroFilter.executeChain (abstractshirofilter.java:449)
At Org.apache.shiro.web.servlet.abstractshirofilter$1.call (abstractshirofilter.java:365)
At Org.apache.shiro.subject.support.SubjectCallable.doCall (subjectcallable.java:90)
At Org.apache.shiro.subject.support.SubjectCallable.call (subjectcallable.java:83)
At Org.apache.shiro.subject.support.DelegatingSubject.execute (delegatingsubject.java:383)
At Org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInternal (abstractshirofilter.java:362)
At Org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter (onceperrequestfilter.java:125)
At Org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate (delegatingfilterproxy.java:344)
At Org.springframework.web.filter.DelegatingFilterProxy.doFilter (delegatingfilterproxy.java:261)
At Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:240)
At Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:207)
At Org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal (characterencodingfilter.java:88)
At Org.springframework.web.filter.OncePerRequestFilter.doFilter (onceperrequestfilter.java:108)
At Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:240)
At Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:207)
At Org.apache.tomcat.websocket.server.WsFilter.doFilter (wsfilter.java:52)
At Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:240)
At Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:207)
At Com.allcam.system.filter.SystemFilter.doFilter (systemfilter.java:87)
At Org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (applicationfilterchain.java:240)
At Org.apache.catalina.core.ApplicationFilterChain.doFilter (applicationfilterchain.java:207)
At Org.apache.catalina.core.StandardWrapperValve.invoke (standardwrappervalve.java:212)
At Org.apache.catalina.core.StandardContextValve.invoke (standardcontextvalve.java:106)
At Org.apache.catalina.authenticator.AuthenticatorBase.invoke (authenticatorbase.java:502)
At Org.apache.catalina.core.StandardHostValve.invoke (standardhostvalve.java:141)
At Org.apache.catalina.valves.ErrorReportValve.invoke (errorreportvalve.java:79)
At Org.apache.catalina.valves.AbstractAccessLogValve.invoke (abstractaccesslogvalve.java:616)
At Org.apache.catalina.core.StandardEngineValve.invoke (standardenginevalve.java:88)
At Org.apache.catalina.connector.CoyoteAdapter.service (coyoteadapter.java:522)
At Org.apache.coyote.http11.AbstractHttp11Processor.process (abstracthttp11processor.java:1095)
At Org.apache.coyote.abstractprotocol$abstractconnectionhandler.process (abstractprotocol.java:672)
At Org.apache.tomcat.util.net.nioendpoint$socketprocessor.dorun (nioendpoint.java:1500)
At Org.apache.tomcat.util.net.nioendpoint$socketprocessor.run (nioendpoint.java:1456)
At Java.util.concurrent.ThreadPoolExecutor.runWorker (threadpoolexecutor.java:1142)
At Java.util.concurrent.threadpoolexecutor$worker.run (threadpoolexecutor.java:617)
At Org.apache.tomcat.util.threads.taskthread$wrappingrunnable.run (taskthread.java:61)
At Java.lang.Thread.run (thread.java:745)

2. Error reason, from the session channel can not get the property value, there are two reasons, my project for the WebService project, need to call another project inside

Interface, the first reason is that when the project interface implementation is called, no data is obtained, or the call succeeds

The second reason, because the database connection is abnormal, no data

3. Workaround: Restart the project, run it again, and then you can run the

Org.apache.shiro.session.InvalidSessionException:java.lang.IllegalStateException:getAttribute:Session already Invalidated] with root cause