[SOLVED] Basic UI crashes with HTTP 500 error when try to start

fibu-freak · December 9, 2018, 11:46am

Platform information:
- Hardware: _ Raspberry Pi 3 Model B Rev 1.2_
OS: Raspbian GNU/Linux 8 (jessie)
- Java Runtime Environment: (Zulu Embedded 8.25.0.76-linux-aarch32hf) (build 1.8.0_152-b76)
- openHAB version: OH 2.4.0.M7
- Bindings:Astro, AVM, EXEC, MQTT, Network, NTP, Samsung, Sonos, Weather (binding-weather1), OpenWeatherMap, MapDB-Persitence, http
- Transformations: exec, Javascript, JSONPATH, Map, RegEx, Scale

Hi,
i have a problem with the basic ui since yesterday as it suddenly comes up with:

logger:

2018-12-09 11:53:53.300 [WARN ] [org.eclipse.jetty.server.HttpChannel] - /basicui/app
java.lang.NullPointerException: null
	at org.eclipse.smarthome.ui.internal.items.ItemUIRegistryImpl.convertStateToWidgetUnit(ItemUIRegistryImpl.java:431) ~[?:?]
	at org.eclipse.smarthome.ui.internal.items.ItemUIRegistryImpl.getLabel(ItemUIRegistryImpl.java:404) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.render.AbstractWidgetRenderer.preprocessSnippet(AbstractWidgetRenderer.java:121) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.render.TextRenderer.renderWidget(TextRenderer.java:61) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.renderWidget(PageRenderer.java:194) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.processChildren(PageRenderer.java:160) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.processChildren(PageRenderer.java:181) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.render.PageRenderer.processPage(PageRenderer.java:124) ~[?:?]
	at org.eclipse.smarthome.ui.basic.internal.servlet.WebAppServlet.service(WebAppServlet.java:189) ~[?:?]
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:790) ~[29:javax.servlet-api:3.1.0]
	at org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:865) ~[?:?]
	at org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535) ~[?:?]
	at org.ops4j.pax.web.service.jetty.internal.HttpServiceServletHandler.doHandle(HttpServiceServletHandler.java:71) ~[?:?]
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:146) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.security.SecurityHandler.handle(SecurityHandler.java:548) ~[?:?]
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:257) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1317) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.ops4j.pax.web.service.jetty.internal.HttpServiceContext.doHandle(HttpServiceContext.java:293) ~[?:?]
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473) ~[?:?]
	at org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1219) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.ops4j.pax.web.service.jetty.internal.JettyServerHandlerCollection.handle(JettyServerHandlerCollection.java:80) ~[?:?]
	at org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.Server.handle(Server.java:531) ~[84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352) [84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260) [84:org.eclipse.jetty.server:9.4.11.v20180605]
	at org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281) [75:org.eclipse.jetty.io:9.4.11.v20180605]
	at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102) [75:org.eclipse.jetty.io:9.4.11.v20180605]
	at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118) [75:org.eclipse.jetty.io:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.runTask(EatWhatYouKill.java:333) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:310) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:168) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:126) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:762) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:680) [87:org.eclipse.jetty.util:9.4.11.v20180605]
	at java.lang.Thread.run(Thread.java:748) [?:?]
2018-12-09 11:54:04.263 [INFO ] [marthome.model.script.astro-rules_99] -  Moondistance updated every 5 Minutes by "astro.things " 2018-12-09T11:54:01.714+0100 / 1 Log only once an hour
2018-12-09 12:14:00.628 [INFO ] [.smarthome.model.script.sonoff.rules] - Tasmota Rel.Vers. set to Items:

When trying to start basic ui i get this screen:

What i did then:

Stop OH2 service
rm -rf /var/lib/openhab2/cache/*
rm -rf /var/lib/openhab2/tmp/*
Shutdown and Start after a while

Result: Same error.

Next: Same procedure plus

sudo apt-get update
sudo apt-get install openhab2

Result: Same error

Next: Uninstall basic ui and install again via paper ui.
Result: Same error

Any proposals or hints ? Don’t know what to do else

thx in advance for every tip.

fibu-freak · December 10, 2018, 12:11pm

After a lot of testing i found the solution, where i never thougt, that it can cause such an error.

It was just a wrong definition of a measurement-sign in the .sitemap file.

Just for those not to fall into the same trap:

In the .items-file i declared this item (UoM):

Number:Pressure      localHourlyForecast3Pressure            "in 03 hours barometric pressure [%.1f %unit%]"                <pressure>    (gOWM)              { channel="openweathermap:weather-and-forecast:api:local:forecastHours03#pressure" }

and in .sitemap-file i declared:

Default item=localHourlyForecast3Pressure label="Luftdruck [%.1f C]"

So UoM-Conversation was not able to transform the correct Measure, on the basis of of a wrong Relation.
When changing from “C” to “mbar” or hPa" or of course “%unit%” in the .sitemap-file everything works fine now.
So the correct definition looks like this:

Default item=localHourlyForecast3Pressure label="Luftdruck [%.1f “%unit%]”