jxbrowser-troubleshooting

Building & Running

Build

Run:

./gradlew clean build

This puts a self-contained, executable JAR under the build/libs directory.

Running locally

Once built, then run:

java -Dspring.config=. -Djava.awt.headless=false -jar build/libs/jxbrowser-troubleshooting.jar

And the app will run and launch a Swing window pointed to the URL specified in the StartupListener class.

Current Issues

1. Exception at startup

Although the app (and JxBrowser) starts up seemingly fine, in the logs an exception is actually thrown at startup:

Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException
	at com.teamdev.jxbrowser.internal.util.Preconditions.checkArgument(Preconditions.java:32)
	at com.teamdev.jxbrowser.browser.internal.RenderWidget.boundsInScreen(RenderWidget.java:117)
	at com.teamdev.jxbrowser.view.swing.internal.OffScreenRenderWidget.updateBoundsInScreen(OffScreenRenderWidget.java:313)
	at com.teamdev.jxbrowser.view.swing.internal.OffScreenRenderWidget.access$2100(OffScreenRenderWidget.java:71)
	at com.teamdev.jxbrowser.view.swing.internal.OffScreenRenderWidget$WindowMovedListener.componentMoved(OffScreenRenderWidget.java:625)
	at java.awt.AWTEventMulticaster.componentMoved(AWTEventMulticaster.java:170)
	at java.awt.AWTEventMulticaster.componentMoved(AWTEventMulticaster.java:169)
	at java.awt.Component.processComponentEvent(Component.java:6362)
	at java.awt.Component.processEvent(Component.java:6313)
	at java.awt.Container.processEvent(Container.java:2237)
	at java.awt.Window.processEvent(Window.java:2025)
	
	<rest of stacktrace omitted for brevity>

2. Cannot load localhost URL

When the URL specified in the StartupListener class is a non-localhost address, the URL is fetched and loaded without issue. You can see this in action by running the app (see directions above) with the URL set to, say, https://www.nike.com/. When you do this, when the app starts up, a JxBrowser window with the Nike homepage loads beautifully!

However, if you first run a local web server off any port (8080, whatever), and point JxBrowser to load that localhost URL, you will get a JxBrowser window displaying 404 "Not Found" error message, along with a Reload button. If you then click Reload, the localhost URL loads perfectly fine the second time around. But this is a non-starter for me: I need it to load the localhost URL the very first time!

3. Exact steps to reproduce this one

Change the URL in StartupListener to point to this homepage like so:

browser.navigation().loadUrl("http://localhost:9200/");

Build and run the app. You will see JxBrowser load something that looks like this:

This is the problem! I should be seeing the Spring login page!

Now click the Reload button and you will see:

JxBrowser hangs on close

If you start the app and try to close the JxBrowser window on a mac via Command+Q, the process will hang and the pid needs to be killed on the terminal. Conversely, if the pid is killed directly from the terminal (Control + C) it terminates without hanging.

bitbythecron/jxbrowser-troubleshooting