java.lang.IllegalStateException: forward() not allowed after buffer has
committed.
at com.caucho.server.webapp.RequestDispatcherImpl.forward(RequestDispatcherImpl.java:145)
at com.caucho.server.webapp.RequestDispatcherImpl.error(RequestDispatcherImpl.java:119)
at com.caucho.server.webapp.ErrorPageManager.sendServletError(ErrorPageManager.java:366)
at com.caucho.server.webapp.WebAppFilterChain.doFilter(WebAppFilterChain.java:179)
at com.caucho.server.dispatch.ServletInvocation.service(ServletInvocation.java:221)
at com.caucho.server.http.HttpRequest.handleRequest(HttpRequest.java:263)
at com.caucho.server.port.TcpConnection.run(TcpConnection.java:331)
at com.caucho.util.ThreadPool.runTasks(ThreadPool.java:464)
at com.caucho.util.ThreadPool.run(ThreadPool.java:408)
at java.lang.Thread.run(Thread.java:534)
