"HTTP 500" / "Render queue error in BeginRender" for page with form.

[Pitman, Andrew]

Hi all,

I've done some T4 development in the past, and now I'm trying to break into the 
T5 world.  I'm getting a peculiar error when I try to add a form to one of my 
pages.  I've dug around in the mailing list archives and on Google, but I 
didn't see anything that pertained to the specific error I'm seeing or my 
circumstances.  The error I'm getting is as follows:

HTTP ERROR 500

Problem accessing /pepe/login/page. Reason:

    Render queue error in 
BeginRender[core/ExceptionReport:exceptiondisplay.loop_1]: Error serializing 
component action for component core/ExceptionReport:exceptiondisplay.loop_1: 
write beyond end of stream

A stack trace follows and is available upon request.  I'm using Tapestry 5.3.7 
with openjdk-1.6.0 on CentOS 6.5, and Eclipse 3.6.1 (Helios) for an IDE with 
RunJettyRun to build and test.

I've followed the form example on the tapestry.apache.org site, as well as the 
tapestry5-hotel-booking example app from GitHub (and there are some 
discrepancies between the two) with the same result.

Here is my LoginPage class:

public class LoginPage {

                @Persist
                @Property
                private String userName;

                @Property
                private String password;

                @Inject
private Authenticator authenticator;

                @Component
                private Form login;

                @Inject
                private CoreContext coreContext;

                @SessionState
                private UserSession userSession;

                public Object onActivate() {
                                return userSession.isAuthenticated() ? 
MainPage.class : null;
                }

                void onValidateFromLogin() {
                                User user=authenticator.authUser(userName, 
password);
                                if (user != null){
                                                // Set up user session with 
user info
                                                userSession.setUser(user);
                                                
userSession.setAuthenticated(true);
                                } else {
                                                // Record an error
                                                login.recordError("Invalid 
login");
}
}

                Object onSuccess() {
                                return MainPage.class;
                }
}

The form in my .tml template is as so:

                <t:form t:id="login">
                                <t:errors />
                                Username:
                                <t:textfield t:id="userName" 
validate="required" size="20" />
                                <br/>
                                Password:
                                <t:passwordfield t:id="password" 
validate="required" size="20" />
                                <br/>
                                <input type="submit" value="Login"/>
                </t:form>

Everything else on that page and others in my app seem to work fine, but with 
the addition of the form, I get this error.  The error I'm getting appears to 
be generated by Jetty, and is not the usual Tapestry exception page.  Has 
anyone ever seen this error or know where I might look to find the cause of 
this error?

Thanks in advance,
Andy

[Compassion, Excellence, Reliability]
________________________________

CONFIDENTIALITY NOTICE: This email may contain information belonging to BAYADA 
and is protected by law. Do not forward, copy, or otherwise disclose to anyone 
unless permitted by BAYADA or required by law. If you are not the intended 
recipient, please notify the sender immediately.