Hi!
I updated my openhab from 2.0 to 2.1 on my rpi3 yesterday.
After the update and several reboots my inbox in Paper UI gives a Error 500: Internal Server Error.
So now i cant add things or detect anything. Everything else seems to work fine, i can control my items.
Any idea on how to solve this?
not 100% sure if this will help, but it’s worth a try:
sudo su
systemctl stop openhab2
rm -rf /var/lib/openhab2/tmp/*
rm -rf /var/lib/openhab2/cache/*
systemctl start openhab2
tail -f /var/log/openhab2/openhab.log -f /var/log/openhab2/events.log
What do your logs say now? (before this cleanup that I suggested?)
I’m going to try that and report back.
Here is the error from the log before cleanup:
2017-08-24 19:05:26.498 [ERROR] [nternal.DiscoveryServiceRegistryImpl] - Cannot notify the DiscoveryListener org.eclipse.smarthome.config.discovery.internal.PersistentInbox on Thing discovered event!
java.lang.ClassCastException: org.eclipse.smarthome.config.discovery.internal.DiscoveryResultImpl cannot be cast to org.eclipse.smarthome.config.discovery.DiscoveryResult
at org.eclipse.smarthome.config.discovery.internal.PersistentInbox.get(PersistentInbox.java:386)
at org.eclipse.smarthome.config.discovery.internal.PersistentInbox.add(PersistentInbox.java:177)
at org.eclipse.smarthome.config.discovery.internal.PersistentInbox.thingDiscovered(PersistentInbox.java:312)
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl$2.run(DiscoveryServiceRegistryImpl.java:274)
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl$2.run(DiscoveryServiceRegistryImpl.java:1)
at java.security.AccessController.doPrivileged(Native Method)[:1.8.0_144]
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.thingDiscovered(DiscoveryServiceRegistryImpl.java:271)
at org.eclipse.smarthome.config.discovery.AbstractDiscoveryService.thingDiscovered(AbstractDiscoveryService.java:253)
at org.eclipse.smarthome.config.discovery.internal.UpnpDiscoveryService.remoteDeviceAdded(UpnpDiscoveryService.java:125)
at org.eclipse.smarthome.config.discovery.internal.UpnpDiscoveryService.startScan(UpnpDiscoveryService.java:104)
at org.eclipse.smarthome.config.discovery.AbstractDiscoveryService.startScan(AbstractDiscoveryService.java:199)
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.startScan(DiscoveryServiceRegistryImpl.java:392)
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.startScans(DiscoveryServiceRegistryImpl.java:377)
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.startScan(DiscoveryServiceRegistryImpl.java:221)
at org.eclipse.smarthome.io.rest.core.discovery.DiscoveryResource.scan(DiscoveryResource.java:86)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)[:1.8.0_144]
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)[:1.8.0_144]
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)[:1.8.0_144]
at java.lang.reflect.Method.invoke(Method.java:498)[:1.8.0_144]
at org.glassfish.jersey.server.model.internal.ResourceMethodInvocationHandlerFactory$1.invoke(ResourceMethodInvocationHandlerFactory.java:81)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher$1.run(AbstractJavaResourceMethodDispatcher.java:144)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.invoke(AbstractJavaResourceMethodDispatcher.java:161)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.internal.JavaResourceMethodDispatcherProvider$ResponseOutInvoker.doDispatch(JavaResourceMethodDispatcherProvider.java:160)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.internal.AbstractJavaResourceMethodDispatcher.dispatch(AbstractJavaResourceMethodDispatcher.java:99)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.invoke(ResourceMethodInvoker.java:389)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:347)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.model.ResourceMethodInvoker.apply(ResourceMethodInvoker.java:102)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.ServerRuntime$2.run(ServerRuntime.java:326)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:271)[159:org.glassfish.jersey.core.jersey-common:2.22.2]
at org.glassfish.jersey.internal.Errors$1.call(Errors.java:267)[159:org.glassfish.jersey.core.jersey-common:2.22.2]
at org.glassfish.jersey.internal.Errors.process(Errors.java:315)[159:org.glassfish.jersey.core.jersey-common:2.22.2]
at org.glassfish.jersey.internal.Errors.process(Errors.java:297)[159:org.glassfish.jersey.core.jersey-common:2.22.2]
at org.glassfish.jersey.internal.Errors.process(Errors.java:267)[159:org.glassfish.jersey.core.jersey-common:2.22.2]
at org.glassfish.jersey.process.internal.RequestScope.runInScope(RequestScope.java:317)[159:org.glassfish.jersey.core.jersey-common:2.22.2]
at org.glassfish.jersey.server.ServerRuntime.process(ServerRuntime.java:305)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.server.ApplicationHandler.handle(ApplicationHandler.java:1154)[160:org.glassfish.jersey.core.jersey-server:2.22.2]
at org.glassfish.jersey.servlet.WebComponent.serviceImpl(WebComponent.java:473)[157:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.WebComponent.service(WebComponent.java:427)[157:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:388)[157:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:341)[157:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at org.glassfish.jersey.servlet.ServletContainer.service(ServletContainer.java:228)[157:org.glassfish.jersey.containers.jersey-container-servlet-core:2.22.2]
at com.eclipsesource.jaxrs.publisher.internal.ServletContainerBridge.service(ServletContainerBridge.java:76)[11:com.eclipsesource.jaxrs.publisher:5.3.1.201602281253]
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)[73: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:748)[:1.8.0_144]
2017-08-24 19:05:31.519 [ERROR] [nternal.DiscoveryServiceRegistryImpl] - Cannot notify the DiscoveryListener 'org.eclipse.smarthome.config.discovery.internal.PersistentInbox' on all things removed event!
java.lang.ClassCastException: org.eclipse.smarthome.config.discovery.internal.DiscoveryResultImpl cannot be cast to org.eclipse.smarthome.config.discovery.DiscoveryResult
at org.eclipse.smarthome.config.discovery.internal.PersistentInbox.get(PersistentInbox.java:272)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.internal.PersistentInbox.getAll(PersistentInbox.java:283)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.internal.PersistentInbox.removeOlderResults(PersistentInbox.java:326)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl$4.run(DiscoveryServiceRegistryImpl.java:321)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl$4.run(DiscoveryServiceRegistryImpl.java:1)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at java.security.AccessController.doPrivileged(Native Method)[:1.8.0_144]
at org.eclipse.smarthome.config.discovery.internal.DiscoveryServiceRegistryImpl.removeOlderResults(DiscoveryServiceRegistryImpl.java:318)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.AbstractDiscoveryService.removeOlderResults(AbstractDiscoveryService.java:317)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.AbstractDiscoveryService.removeOlderResults(AbstractDiscoveryService.java:294)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.internal.UpnpDiscoveryService.stopScan(UpnpDiscoveryService.java:112)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at org.eclipse.smarthome.config.discovery.AbstractDiscoveryService$1.run(AbstractDiscoveryService.java:187)[97:org.eclipse.smarthome.config.discovery:0.9.0.b5]
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)[:1.8.0_144]
at java.util.concurrent.FutureTask.run(FutureTask.java:266)[:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180)[:1.8.0_144]
at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293)[:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)[:1.8.0_144]
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)[:1.8.0_144]
at java.lang.Thread.run(Thread.java:748)[:1.8.0_144]```Clearing the tmp & cache folder seems to have done the job!
Now the inbox shows discovered things. And I have learned something new 
Thank you very much.
I am having the same problem on my OpenHab installation running on a Raspberry PI 3. When I follow your steps it gets OpenHab up and running, but no activity ever appears in the logs. Also, after a reboot it doesn’t work again until I do your steps again. Any help would be appreciated. Thanks.