Habpanel dont start, only black screen in browser

Apps & Services HABPanel
1

Habpanel isn’t working, in the webbrowser i see a black screen but no content, after sometime the Text is shown: “Connection Lost! trying to reconnect”

In the openhab.log i see this warning:

2017-02-26 20:49:05.299 [WARN ] [eclipse.jetty.servlet.ServletHandler] - /habpanel/vendor/vendor.js
java.io.IOException: org.eclipse.jetty.util.SharedBlockingCallback$BlockerTimeoutException
at org.eclipse.jetty.util.SharedBlockingCallback$Blocker.block(SharedBlockingCallback.java:213)[85:org.eclipse.jetty.util:9.2.19.v20160908]
at org.eclipse.jetty.server.HttpOutput.sendContent(HttpOutput.java:548)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.ResourceServlet.doGet(ResourceServlet.java:301)[174:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:687)[21:javax.servlet-api:3.1.0]
at javax.servlet.http.HttpServlet.service(HttpServlet.java:790)[21:javax.servlet-api:3.1.0]
at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:812)[83:org.eclipse.jetty.servlet:9.2.19.v20160908]
at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:587)[83:org.eclipse.jetty.servlet:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71)[174:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:143)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:577)[81:org.eclipse.jetty.security:9.2.19.v20160908]
at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:223)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1127)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:287)[174:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:515)[83:org.eclipse.jetty.servlet:9.2.19.v20160908]
at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:185)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1061)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:141)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80)[174:org.ops4j.pax.web.pax-web-jetty:4.3.0]
at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:97)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.Server.handle(Server.java:499)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:311)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:257)[82:org.eclipse.jetty.server:9.2.19.v20160908]
at org.eclipse.jetty.io.AbstractConnection$2.run(AbstractConnection.java:544)[74:org.eclipse.jetty.io:9.2.19.v20160908]
at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:635)[85:org.eclipse.jetty.util:9.2.19.v20160908]
at org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:555)[85:org.eclipse.jetty.util:9.2.19.v20160908]
at java.lang.Thread.run(Thread.java:745)[:1.8.0_121]
Caused by: org.eclipse.jetty.util.SharedBlockingCallback$BlockerTimeoutException
at org.eclipse.jetty.util.SharedBlockingCallback$Blocker.block(SharedBlockingCallback.java:195)[85:org.eclipse.jetty.util:9.2.19.v20160908]
… 25 more

2

Never saw this issue before, did you manage to make it work? Anyone else having this problem?

3

Now it works, i have nothing changed. strange!

4

I have the same issue right now, however can’t see anything in the logs.

I played around in the habpanel config “Panel registry JSON” using PAPERUI in an effort to adapt a custom widget. However, now I only get to see a black screen when opening habpanel index.html.

Any ideas how to fix that? Restoring the habpanel defaults would be an option as I could easily recreate my dashboard from scratch.

Thanks
Daniel

5

I just had the same Problem. After a lot of searching I went to

configuration \ Services \ Habpanel

I my config-file, there was a test Gallery with an absolute path: "c:\temp…\picname.jpg"
I changed it to “./picname.jpg”

now it is ok.

Horst