OC4J ContentType error

Question

Running a newly installed OC4J Instance and Web Forms 10.1.2.3.0 plus the latest OPatch patches, I am getting repeated error messages in the OC4J window when I start a form from the browser. The message is:
11/11/15 10:01:18 formsweb: The application failed to set a complete content type, text/plain, for request path: /lservlet
I get the same three messages when I just start and exit the demo form screen using the URL:
http://127.0.0.1:8889/forms/frmservlet
The error occurs multiple times: twice when my form starts, once when it exits, but not while the form is working. It occurs the same in both Internet Explorer and Firefox. I cannot seem to find this message reported anywhere, so I thought I'd ask here first.
If it helps, I am using the standard base.htm and basejpi.htm files, identified in the formsweb.cfg file.
Curiously, the formsweb.cfg file makes two references to "/lservlet" identified in the error message, but within my D:\DevSuiteHome_1\forms path, there is no \lservlet subdirectory.# Forms applet parameter: URL path to Forms ListenerServlet
serverURL=/forms/lservlet
# Example Named Configuration Section
# Example 3: configuration running the Forms ListenerServlet in debug mode
# (debug messages will be written to the servlet engine's log file).
[debug]
serverURL=/forms/lservlet/debugAny help with this error message will be greatly appreciated.
Thanks!

Answer 1

Steve,
Unless you are finding that something doesn't work correctly, the error can likely be ignored. As for the cause, it may be related to bug 10186820 which is not fixed until version 11. One other point, remember that Developer Suite is inteneded for design-time, single user, local use only. So if you are accessing this OC4J instance from a remote client, this is not what it was intended for.
Regarding your question about "lservlet" or Listener Servlet, lservlet is the Forms Listener Servlet which is part of the complete "Forms Servlet". Both the "Forms Servlet" and "Forms Listener Servlet" are included in frmsrv.jar. We reference and alias the Servlets in web.xml (for Forms 10).
Remember that it is the Forms Servlet (frmservlet) that is responsible for generating the html which eventually causes the client applet to start. It is the ListenerServlet (lservlet) that does all the work after the applet has started.