Vojtěch Krása created WICKET-5912:
-------------------------------------
Summary: NPE in Page#hasInvisibleTransparentChild
Key: WICKET-5912
URL: https://issues.apache.org/jira/browse/WICKET-5912
Project: Wicket
Issue Type: Bug
Components: wicket
Affects Versions: 7.0.0-M5
Reporter: Vojtěch Krása
I started to use #queue instead of TransparentWebMarkupContainer as suggested
in WICKET-5898, to my surprise #replace does not work for queued components (it
is a feature, right?) :
{code}
org.apache.wicket.WicketRuntimeException: Cannot replace a component which has
not been added: id='PANEL', component=[EmptyPanel [Component id = PANEL]]:
[Page class = krasa.wicket.npe.BrokenPage, id = 0, render count = 1]
at org.apache.wicket.MarkupContainer.replace(MarkupContainer.java:736)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at krasa.wicket.npe.BrokenPage$1.onSubmit(BrokenPage.java:24)
~[classes/:?]
at
org.apache.wicket.ajax.markup.html.form.AjaxButton$1.onSubmit(AjaxButton.java:111)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.ajax.form.AjaxFormSubmitBehavior$AjaxFormSubmitter.onSubmit(AjaxFormSubmitBehavior.java:215)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.markup.html.form.Form.delegateSubmit(Form.java:1307)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at org.apache.wicket.markup.html.form.Form.process(Form.java:974)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.markup.html.form.Form.onFormSubmitted(Form.java:795)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.ajax.form.AjaxFormSubmitBehavior.onEvent(AjaxFormSubmitBehavior.java:171)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.ajax.AjaxEventBehavior.respond(AjaxEventBehavior.java:156)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.ajax.AbstractDefaultAjaxBehavior.onRequest(AbstractDefaultAjaxBehavior.java:581)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
~[?:1.7.0_72]
at
sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
~[?:1.7.0_72]
at
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
~[?:1.7.0_72]
at java.lang.reflect.Method.invoke(Method.java:606) ~[?:1.7.0_72]
at
org.apache.wicket.RequestListenerInterface.internalInvoke(RequestListenerInterface.java:258)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.RequestListenerInterface.invoke(RequestListenerInterface.java:241)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.invokeListener(ListenerInterfaceRequestHandler.java:248)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.core.request.handler.ListenerInterfaceRequestHandler.respond(ListenerInterfaceRequestHandler.java:234)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:865)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
~[wicket-request-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:261)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:203)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:284)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
[jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
[jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
[jetty-security-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
[jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at org.eclipse.jetty.server.Server.handle(Server.java:497)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
[jetty-io-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
[jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
[jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_72]
{code}
When I click on back button, it will give me an NPE:
{code}
java.lang.NullPointerException
at org.apache.wicket.Page.hasInvisibleTransparentChild(Page.java:679)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at org.apache.wicket.Page.checkRendering(Page.java:645)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at org.apache.wicket.Page.onAfterRender(Page.java:821)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.markup.html.WebPage.onAfterRender(WebPage.java:216)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at org.apache.wicket.Component.afterRender(Component.java:918)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at org.apache.wicket.Component.render(Component.java:2319)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at org.apache.wicket.Page.renderPage(Page.java:1018)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.handler.render.WebPageRenderer.renderPage(WebPageRenderer.java:124)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.handler.render.WebPageRenderer.respond(WebPageRenderer.java:195)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.core.request.handler.RenderPageRequestHandler.respond(RenderPageRequestHandler.java:175)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle$HandlerExecutor.respond(RequestCycle.java:865)
~[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.RequestHandlerStack.execute(RequestHandlerStack.java:64)
~[wicket-request-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle.execute(RequestCycle.java:265)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle.processRequest(RequestCycle.java:222)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.request.cycle.RequestCycle.processRequestAndDetach(RequestCycle.java:293)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.protocol.http.WicketFilter.processRequestCycle(WicketFilter.java:261)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.protocol.http.WicketFilter.processRequest(WicketFilter.java:203)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.apache.wicket.protocol.http.WicketFilter.doFilter(WicketFilter.java:284)
[wicket-core-7.0.0-SNAPSHOT.jar:7.0.0-SNAPSHOT]
at
org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1652)
[jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:585)
[jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)
[jetty-security-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)
[jetty-servlet-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at org.eclipse.jetty.server.Server.handle(Server.java:497)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:310)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)
[jetty-server-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:540)
[jetty-io-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)
[jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
at
org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)
[jetty-util-9.2.10.v20150310.jar:9.2.10.v20150310]
at java.lang.Thread.run(Thread.java:745) [?:1.7.0_72]
{code}
(both in 7.0.0-M5 and current master)
quickstart: https://github.com/krasa/wicket-bugs
-Start
-open http://localhost:8080/
-click on the button
-click Back
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