我在服务器日志中出现以下错误时出现以下错误，我不知道哪个方法引发此错误以及导致此错误的原因是什么。任何人都可以帮助我吗？
[org.apache.catalina.core.ContainerBase.[jboss.web].[default-host].[/].[default]]
(http--103.8.126.145-80-7) Servlet.service() for servlet default threw exception: java.lang.IllegalStateException at
org.apache.catalina.connector.ResponseFacade.sendError(ResponseFacade.java:408)
[jbossweb-7.0.13.Final.jar:] at
org.apache.struts2.dispatcher.Dispatcher.sendError(Dispatcher.java:852)
[struts2-core-2.3.4.1.jar:2.3.4.1] at
org.apache.struts2.dispatcher.Dispatcher.serviceAction(Dispatcher.java:534)
[struts2-core-2.3.4.1.jar:2.3.4.1] at
org.apache.struts2.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:432)
[struts2-core-2.3.4.1.jar:2.3.4.1] at
org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:280)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:248)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:275)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:161)
[jbossweb-7.0.13.Final.jar:] at
org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)
[jboss-as-jpa-7.1.1.Final.jar:7.1.1.Final] at
org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:153)
[jboss-as-web-7.1.1.Final.jar:7.1.1.Final] at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:155)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:567)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
[jbossweb-7.0.13.Final.jar:] at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:368)
[jbossweb-7.0.13.Final.jar:] at
org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:877)
[jbossweb-7.0.13.Final.jar:] at
org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:671)
[jbossweb-7.0.13.Final.jar:] at
org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:930)
[jbossweb-7.0.13.Final.jar:] at java.lang.Thread.run(Thread.java:724)
[rt.jar:1.7.0_25]