Included servlet error: 500

Location: /demo/release6/index.jsp

Error Location: /demo/release6/tools/viewSession.jsp

javax.servlet.ServletException: Response has already been committed
	at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImpl.java:412)
	at demo.release6.tools.viewSession_1._jspService(viewSession_1.java:3182)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:78)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:534)
	at org.apache.tomcat.core.Handler.invoke(Handler.java:280)
	at org.apache.tomcat.core.Handler.service(Handler.java:193)
	at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:445)
	at org.apache.tomcat.facade.RequestDispatcherImpl.doInclude(RequestDispatcherImpl.java:364)
	at org.apache.tomcat.facade.RequestDispatcherImpl.include(RequestDispatcherImpl.java:151)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:365)
	at demo.release6.index_1._jspService(index_1.java:299)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:78)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:534)
	at org.apache.tomcat.core.Handler.invoke(Handler.java:280)
	at org.apache.tomcat.core.Handler.service(Handler.java:193)
	at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:445)
	at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:874)
	at org.apache.tomcat.core.ContextManager.service(ContextManager.java:790)
	at org.apache.coyote.tomcat3.Tomcat3Adapter.service(Tomcat3Adapter.java:64)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:296)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:372)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:691)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:625)
	at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:804)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
	at java.lang.Thread.run(Thread.java:534)
Root cause:
java.lang.IllegalStateException: Response has already been committed
	at org.apache.tomcat.facade.HttpServletResponseFacade.sendError(HttpServletResponseFacade.java:190)
	at org.apache.tomcat.facade.HttpServletResponseFacade.sendRedirect(HttpServletResponseFacade.java:216)
	at demo.release6.tools.viewSession_1._jspService(viewSession_1.java:2785)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:78)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:534)
	at org.apache.tomcat.core.Handler.invoke(Handler.java:280)
	at org.apache.tomcat.core.Handler.service(Handler.java:193)
	at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:445)
	at org.apache.tomcat.facade.RequestDispatcherImpl.doInclude(RequestDispatcherImpl.java:364)
	at org.apache.tomcat.facade.RequestDispatcherImpl.include(RequestDispatcherImpl.java:151)
	at org.apache.jasper.runtime.PageContextImpl.include(PageContextImpl.java:365)
	at demo.release6.index_1._jspService(index_1.java:299)
	at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:78)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java)
	at org.apache.tomcat.facade.ServletHandler.doService(ServletHandler.java:534)
	at org.apache.tomcat.core.Handler.invoke(Handler.java:280)
	at org.apache.tomcat.core.Handler.service(Handler.java:193)
	at org.apache.tomcat.facade.ServletHandler.service(ServletHandler.java:445)
	at org.apache.tomcat.core.ContextManager.internalService(ContextManager.java:874)
	at org.apache.tomcat.core.ContextManager.service(ContextManager.java:790)
	at org.apache.coyote.tomcat3.Tomcat3Adapter.service(Tomcat3Adapter.java:64)
	at org.apache.jk.server.JkCoyoteHandler.invoke(JkCoyoteHandler.java:296)
	at org.apache.jk.common.HandlerRequest.invoke(HandlerRequest.java:372)
	at org.apache.jk.common.ChannelSocket.invoke(ChannelSocket.java:691)
	at org.apache.jk.common.ChannelSocket.processConnection(ChannelSocket.java:625)
	at org.apache.jk.common.SocketConnection.runIt(ChannelSocket.java:804)
	at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:644)
	at java.lang.Thread.run(Thread.java:534)