Created ticket https://issues.apache.org/jira/browse/ISIS-1544

On 11/30/2016 09:09 AM, Dan Haywood wrote:
Yes, do raise a ticket for the double-click issue; I think Martin suggested
that it would be fixable.
Thx


On Wed, 30 Nov 2016 at 08:07 Erik de Hair <e.deh...@pocos.nl> wrote:

On 11/07/2016 03:06 PM, Dan Haywood wrote:
Perhaps you could just throw and catch a stacktrace in both cases,
logging
to stdout; then force the error and see what you get?
I'm sorry. I can't figure this out.  May be it's gone with the next
Wicket upgrade. It's not really a problem because the user experience is
not influenced and it has no other impacts.

The other exception after a double click on an okButton is a problem
though. Should I raise a ticket for that?
On 7 Nov 2016 3:01 p.m., "Erik de Hair" <e.deh...@pocos.nl> wrote:

On 11/07/2016 02:07 PM, Martin Grigorov wrote:

On Mon, Nov 7, 2016 at 12:04 PM, Erik de Hair <e.deh...@pocos.nl>
wrote:
On 11/07/2016 09:57 AM, Martin Grigorov wrote:
There's another frequently occurring exception in the log that occurs
when using the autocomplete field:

java.lang.IllegalStateExceptiongetOutputStream() has already been
called
for this response org.apache.catalina.connector.
Response#getWriter(Response.java:678)

This is a bug, but I am not sure where exactly.

An application should not try to write both to the Servlet's writer
and
outputStream in the same response.

The easiest way to debug is to put a breakpoint at

ResponseFacade#getWriter() and ResponseFacade#getOutputStream() and
see
what happens.

The TextChoiceProvider is writing to the outputstream. Is that what
you
wanted to know?

I believe this is not the cause.
The previous stacktrace shows that a redirect is attempted. I don't
expect
a redirect after sending the JSON response for the Select2 component.
I guess the http request didn't fail with the previous exception after
you
released the breakpoint ?

You're right. That's not throwing any exception. I don't know how to
debug
this. When I put a breakpoint on getWriter() only, it behaves
differently
because the ajax request times out (I believe) and I get a different
exception.

"http-bio-8080-exec-10@22498" daemon prio=5 tid=0x44 nid=NA runnable
     java.lang.Thread.State: RUNNABLE
         at
org.apache.catalina.connector.ResponseFacade.getOutputStream
(ResponseFacade.java:196)
         at org.apache.wicket.protocol.http.servlet.ServletWebResponse.
write(ServletWebResponse.java:135)
         at
org.apache.wicket.protocol.http.HeaderBufferingWebResponse.w
rite(HeaderBufferingWebResponse.java:196)
         at
org.apache.wicket.request.Response$StreamAdapter.write(Respo
nse.java:148)
         at sun.nio.cs.StreamEncoder.writeBytes(StreamEncoder.java:221)
         at sun.nio.cs.StreamEncoder.implWrite(StreamEncoder.java:282)
         at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:125)
         - locked <0x57e8> (a java.io.OutputStreamWriter)
         at sun.nio.cs.StreamEncoder.write(StreamEncoder.java:135)
         at
java.io.OutputStreamWriter.write(OutputStreamWriter.java:220)
         at java.io.Writer.write(Writer.java:157)
         at org.apache.wicket.ajax.json.JSONWriter.key(JSONWriter.java:
212)
         at
org.wicketstuff.select2.TextChoiceProvider.toJson(TextChoice
Provider.java:38)
         at
org.wicketstuff.select2.AbstractSelect2Choice.onResourceRequ
ested(AbstractSelect2Choice.java:473)
         at
org.wicketstuff.select2.Select2Choice.onResourceRequested(Se
lect2Choice.java:36)
         at
sun.reflect.NativeMethodAccessorImpl.invoke0(NativeMethodAcc
essorImpl.java:-1)
         at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAcce
ssorImpl.java:62)
         at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMe
thodAccessorImpl.java:43)
         at java.lang.reflect.Method.invoke(Method.java:498)
         at
org.apache.wicket.RequestListenerInterface.internalInvoke(Re
questListenerInterface.java:258)
         at
org.apache.wicket.RequestListenerInterface.invoke(RequestLis
tenerInterface.java:216)
         at
org.apache.wicket.core.request.handler.ListenerInterfaceRequ
estHandler.invokeListener(ListenerInterfaceRequestHandler.java:243)
         at
org.apache.wicket.core.request.handler.ListenerInterfaceRequ
estHandler.respond(ListenerInterfaceRequestHandler.java:236)
         at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor
.respond(RequestCycle.java:890)
         at
org.apache.wicket.request.RequestHandlerStack.execute(Reques
tHandlerStack.java:64)
         at
org.apache.wicket.request.cycle.RequestCycle.execute(Request
Cycle.java:261)
         at
org.apache.wicket.request.cycle.RequestCycle.processRequest(
RequestCycle.java:218)
         at
org.apache.wicket.request.cycle.RequestCycle.processRequestA
ndDetach(RequestCycle.java:289)
         at
org.apache.wicket.protocol.http.WicketFilter.processRequestC
ycle(WicketFilter.java:259)
         at
org.apache.wicket.protocol.http.WicketFilter.processRequest(
WicketFilter.java:201)
         at
org.apache.wicket.protocol.http.WicketFilter.doFilter(Wicket
Filter.java:282)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFi
lter(ApplicationFilterChain.java:241)
         at
org.apache.catalina.core.ApplicationFilterChain.doFilter(App
licationFilterChain.java:208)
         at
org.apache.shiro.web.servlet.AbstractShiroFilter.executeChai
n(AbstractShiroFilter.java:449)
         at
org.apache.shiro.web.servlet.AbstractShiroFilter$1.call(Abst
ractShiroFilter.java:365)
         at org.apache.shiro.subject.support.SubjectCallable.doCall(
SubjectCallable.java:90)
         at
org.apache.shiro.subject.support.SubjectCallable.call(Subjec
tCallable.java:83)
         at org.apache.shiro.subject.support.DelegatingSubject.execute(
DelegatingSubject.java:383)
         at
org.apache.shiro.web.servlet.AbstractShiroFilter.doFilterInt
ernal(AbstractShiroFilter.java:362)
         at
org.apache.shiro.web.servlet.OncePerRequestFilter.doFilter(O
ncePerRequestFilter.java:125)
         at
org.apache.catalina.core.ApplicationFilterChain.internalDoFi
lter(ApplicationFilterChain.java:241)
         at
org.apache.catalina.core.ApplicationFilterChain.doFilter(App
licationFilterChain.java:208)
         at
org.apache.catalina.core.StandardWrapperValve.invoke(Standar
dWrapperValve.java:220)
         at
org.apache.catalina.core.StandardContextValve.invoke(Standar
dContextValve.java:122)
         at
org.apache.catalina.authenticator.AuthenticatorBase.invoke(A
uthenticatorBase.java:503)
         at
org.apache.catalina.core.StandardHostValve.invoke(StandardHo
stValve.java:170)
         at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorRepo
rtValve.java:103)
         at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogVa
lve.java:950)
         at
org.apache.catalina.core.StandardEngineValve.invoke(Standard
EngineValve.java:116)
         at
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAd
apter.java:421)
         at
org.apache.coyote.http11.AbstractHttp11Processor.process(Abs
tractHttp11Processor.java:1070)
         at
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler
.process(AbstractProtocol.java:611)
         at org.apache.tomcat.util.net
.JIoEndpoint$SocketProcessor.run(
JIoEndpoint.java:314)
         - locked <0x5836> (a org.apache.tomcat.util.net
.SocketWrapper)
         at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPool
Executor.java:1142)
         at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoo
lExecutor.java:617)
         at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.
run(TaskThread.java:61)
         at java.lang.Thread.run(Thread.java:745)

org.apache.catalina.connector.ResponseFacade#getWriter(Respo
nseFacade.java:213)
org.apache.wicket.protocol.http.servlet.ServletWebResponse#s
endRedirect(ServletWebResponse.java:280)
org.apache.wicket.protocol.http.HeaderBufferingWebResponse#s
endRedirect(HeaderBufferingWebResponse.java:117)
org.apache.wicket.request.handler.render.WebPageRenderer#red
irectTo(WebPageRenderer.java:176)
org.apache.wicket.request.handler.render.WebPageRenderer#res
pond(WebPageRenderer.java:242)
org.apache.wicket.core.request.handler.RenderPageRequestHand
ler#respond(RenderPageRequestHandler.java:175)
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor
#respond(RequestCycle.java:890)
org.apache.wicket.request.RequestHandlerStack#execute(Reques
tHandlerStack.java:64)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:310)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#executeExceptio
nRequestHandler(RequestCycle.java:319)
org.apache.wicket.request.cycle.RequestCycle#processRequest(
RequestCycle.java:233)
org.apache.wicket.request.cycle.RequestCycle#processRequestA
ndDetach(RequestCycle.java:289)
org.apache.wicket.protocol.http.WicketFilter#processRequestC
ycle(WicketFilter.java:259)
org.apache.wicket.protocol.http.WicketFilter#processRequest(
WicketFilter.java:201)
org.apache.wicket.protocol.http.WicketFilter#doFilter(Wicket
Filter.java:282)
org.apache.catalina.core.ApplicationFilterChain#internalDoFi
lter(ApplicationFilterChain.java:241)
org.apache.catalina.core.ApplicationFilterChain#doFilter(App
licationFilterChain.java:208)
org.apache.shiro.web.servlet.AbstractShiroFilter#executeChai
n(AbstractShiroFilter.java:449)
org.apache.shiro.web.servlet.AbstractShiroFilter$1#call(Abst
ractShiroFilter.java:365)
org.apache.shiro.subject.support.SubjectCallable#doCall(Subj
ectCallable.java:90)
org.apache.shiro.subject.support.SubjectCallable#call(Subjec
tCallable.java:83)
org.apache.shiro.subject.support.DelegatingSubject#execute(D
elegatingSubject.java:383)
org.apache.shiro.web.servlet.AbstractShiroFilter#doFilterInt
ernal(AbstractShiroFilter.java:362)
org.apache.shiro.web.servlet.OncePerRequestFilter#doFilter(O
ncePerRequestFilter.java:125)
org.apache.catalina.core.ApplicationFilterChain#internalDoFi
lter(ApplicationFilterChain.java:241)
org.apache.catalina.core.ApplicationFilterChain#doFilter(App
licationFilterChain.java:208)
org.apache.catalina.core.StandardWrapperValve#invoke(Standar
dWrapperValve.java:220)
org.apache.catalina.core.StandardContextValve#invoke(Standar
dContextValve.java:122)
org.apache.catalina.authenticator.AuthenticatorBase#invoke(A
uthenticatorBase.java:503)
org.apache.catalina.core.StandardHostValve#invoke(StandardHo
stValve.java:170)
org.apache.catalina.valves.ErrorReportValve#invoke(ErrorRepo
rtValve.java:103)
org.apache.catalina.valves.AccessLogValve#invoke(AccessLogVa
lve.java:950)
org.apache.catalina.core.StandardEngineValve#invoke(Standard
EngineValve.java:116)
org.apache.catalina.connector.CoyoteAdapter#service(CoyoteAd
apter.java:421)
org.apache.coyote.ajp.AjpProcessor#process(AjpProcessor.java:190)
org.apache.coyote.AbstractProtocol$AbstractConnectionHandler
#process(AbstractProtocol.java:611)
org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor#run(J
IoEndpoint.java:314)
java.util.concurrent.ThreadPoolExecutor#runWorker(ThreadPool
Executor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker#run(ThreadPoo
lExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable#r
un(TaskThread.java:61)
        java.lang.Thread#run(Thread.java:745)

The autocomplete works as expected so it doesn't trouble the user.
Anybody else getting this exception or does it depend on our
configuration?

Erik






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