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JDev 12c fails to render jsf page migrated from 11g

AlJan 11 2017 — edited Jun 26 2017

In an app migrated from JDeveloper 11g, the new JDeveloper 12c (with all the updates) fails to display a jsf page in the Design mode ("Waiting for Designer to initialize Rendering page" never disappears), and when switching to Source, it shows an Unexpected error dialog. We are trying to migrate to WLS 12c, and this is disappointing. Is there anything we can do except for filing an issue (from our previous experience, this is unlikely to help)?

Studio Edition Version 12.2.1.2.0

Build JDEVADF_12.2.1.2.0_GENERIC_161008.1648.S

Java(TM) Platform

1.8.0_112

Oracle IDE

12.2.1.2.42.161008.1648

Versioning Support

12.2.1.2.42.161008.1648

The unexpected error details:

org.netbeans.ProxyClassLoader:Jan 12, 2017 8:36:40 AM org.netbeans.ProxyClassLoader stripInitialSlash

WARNING: Should not use initial / in calls to ClassLoader.getResource(s): /META-INF/extension.xml

org.netbeans.ProxyClassLoader:Jan 12, 2017 8:36:41 AM org.netbeans.ProxyClassLoader stripInitialSlash

WARNING: Should not use initial / in calls to ClassLoader.getResource(s): /META-INF/extension.xml

org.netbeans.ProxyClassLoader:Jan 12, 2017 8:36:45 AM org.netbeans.ProxyClassLoader stripInitialSlash

WARNING: Should not use initial / in calls to ClassLoader.getResource(s): /

Jan 12, 2017 8:37:15 AM oracle.ideimpl.feedback2.client.FeedbackManagerImpl uncaughtException

SEVERE: Uncaught Exception

java.lang.NoSuchMethodError: com.sun.webkit.dom.ElementImpl.getClientWidth()I

at oracle.jdevimpl.webapp.webview.editor.gui.facade.jdk8adapters.ElementAdapter8.getClientWidth(ElementAdapter8.java:117)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller.fx_getDetails(WebViewScroller.java:369)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller.fx_updateOverflownViewNodes(WebViewScroller.java:281)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller$3.call(WebViewScroller.java:239)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller$3.call(WebViewScroller.java:235)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewViewManager$16.call(WebViewViewManager.java:1694)

at oracle.jdevimpl.webapp.webview.editor.gui.view.LayoutCallable.call(LayoutCallable.java:51)

at oracle.jdevimpl.webapp.webview.FxApplicationThreadUtil$2.run(FxApplicationThreadUtil.java:189)

at oracle.jdevimpl.webapp.webview.FxApplicationThreadUtil$3.run(FxApplicationThreadUtil.java:255)

at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)

at com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)

at java.security.AccessController.doPrivileged(Native Method)

at com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)

at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)

at com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)

at com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)

at java.lang.Thread.run(Thread.java:745)

java.lang.NoSuchMethodError: com.sun.webkit.dom.ElementImpl.getClientWidth()I

o.ji.webapp.webview.editor.gui.facade.jdk8adapters.ElementAdapter8.getClientWidth(ElementAdapter8.java:117)

o.ji.webapp.webview.editor.gui.view.WebViewScroller.fx_getDetails(WebViewScroller.java:369)

o.ji.webapp.webview.editor.gui.view.WebViewScroller.fx_updateOverflownViewNodes(WebViewScroller.java:281)

o.ji.webapp.webview.editor.gui.view.WebViewScroller$3.call(WebViewScroller.java:239)

o.ji.webapp.webview.editor.gui.view.WebViewScroller$3.call(WebViewScroller.java:235)

o.ji.webapp.webview.editor.gui.view.WebViewViewManager$16.call(WebViewViewManager.java:1694)

o.ji.webapp.webview.editor.gui.view.LayoutCallable.call(LayoutCallable.java:51)

o.ji.webapp.webview.FxApplicationThreadUtil$2.run(FxApplicationThreadUtil.java:189)

o.ji.webapp.webview.FxApplicationThreadUtil$3.run(FxApplicationThreadUtil.java:255)

com.sun.javafx.application.PlatformImpl.lambda$runAndWait$175(PlatformImpl.java:326)

com.sun.javafx.application.PlatformImpl.lambda$null$173(PlatformImpl.java:295)

j.security.AccessController.doPrivileged(Native Method)

com.sun.javafx.application.PlatformImpl.lambda$runLater$174(PlatformImpl.java:294)

com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)

com.sun.glass.ui.gtk.GtkApplication._runLoop(Native Method)

com.sun.glass.ui.gtk.GtkApplication.lambda$null$49(GtkApplication.java:139)

j.lang.Thread.run(Thread.java:745)

Jan 12, 2017 8:37:15 AM oracle.ideimpl.feedback2.client.FeedbackManagerImpl uncaughtException

SEVERE: Uncaught Exception

java.lang.NoSuchMethodError: com.sun.webkit.dom.ElementImpl.getClientWidth()I

at oracle.jdevimpl.webapp.webview.editor.gui.facade.jdk8adapters.ElementAdapter8.getClientWidth(ElementAdapter8.java:117)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller.fx_getDetails(WebViewScroller.java:369)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller.fx_updateOverflownViewNodes(WebViewScroller.java:281)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewScroller.fx_isOverflown(WebViewScroller.java:351)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewLayoutHelper._isFullyVisible(WebViewLayoutHelper.java:1641)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewLayoutHelper.isFullyVisible(WebViewLayoutHelper.java:1317)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewLayoutHelper.createOnShapes(WebViewLayoutHelper.java:484)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewViewManager$6.call(WebViewViewManager.java:1084)

at oracle.jdevimpl.webapp.webview.editor.gui.view.WebViewViewManager$6.call(WebViewViewManager.java:1069)