500 Servlet Exception

java.lang.IllegalStateException: can't clear response after writing headers
	at com.caucho.server.http.ResponseStream.clear(ResponseStream.java:209)
	at com.caucho.server.http.Response.reset(Response.java:1280)
	at com.caucho.server.http.Response.reset(Response.java:1262)
	at org.apache.cocoon.servlet.CocoonServlet.service(CocoonServlet.java:1115)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
	at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
	at com.caucho.server.http.Invocation.service(Invocation.java:315)
	at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:222)
	at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:103)
	at com.caucho.server.http.QRequestDispatcher.forward(QRequestDispatcher.java:80)
	at org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1056)
	at idm.brokerage.common.action.CustomRequestProcessor.doForward(CustomRequestProcessor.java:290)
	at org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:388)
	at idm.brokerage.common.action.CustomRequestProcessor.processForwardConfig(CustomRequestProcessor.java:321)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:231)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1164)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:397)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:126)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:103)
	at com.caucho.server.http.FilterChainServlet.doFilter(FilterChainServlet.java:96)
	at idm.brokerage.front.notice.NoticeFilter.doFilter(NoticeFilter.java:133)
	at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
	at idm.common.filters.encoding.SetCharacterEncoding.doFilter(SetCharacterEncoding.java:51)
	at com.caucho.server.http.FilterChainFilter.doFilter(FilterChainFilter.java:88)
	at com.caucho.server.http.Invocation.service(Invocation.java:315)
	at com.caucho.server.http.RunnerRequest.handleRequest(RunnerRequest.java:346)
	at com.caucho.server.http.RunnerRequest.handleConnection(RunnerRequest.java:274)
	at com.caucho.server.TcpConnection.run(TcpConnection.java:139)
	at java.lang.Thread.run(Thread.java:534)