Hi Richard,

Thanks for the update. Can you share what you did (for other Vaadin users) ?

Regards
JB

> Le 4 mai 2021 à 11:01, Richard Hierlmeier <rhierlme...@googlemail.com> a 
> écrit :
> 
> Finally I got my Vaadin 8 application running on Karaf 4.3.1. It brings now 
> it's own servlet that handles the /VAADIN/ requests. This work fine. I do no 
> longer install the vaadin-osgi-intregration bundle.
> 
> 
> 
> 
> Am Mo., 3. Mai 2021 um 16:27 Uhr schrieb Jean-Baptiste Onofre 
> <j...@nanthrax.net <mailto:j...@nanthrax.net>>:
> Hi,
> 
> It looks like the ContextModel is null (causing the NPE).
> 
> It because the servlet model doesn’t have any context. I can guard this in 
> Pax Web, but the resource is probably not complete in Vaadin.
> 
> Regards
> JB
> 
>> Le 3 mai 2021 à 16:18, Richard Hierlmeier <rhierlme...@googlemail.com 
>> <mailto:rhierlme...@googlemail.com>> a écrit :
>> 
>> I upgraded my installation to Vaadin 8.13.0 (in the hope that this fixes my 
>> problem. But now I have a different error:
>> 
>> 2021-05-03T16:05:08,504 | ERROR | features-3-thread-1 | HttpServiceStarted   
>>             | 100 - org.ops4j.pax.web.pax-web-runtime - 7.3.13 | Could not 
>> start the servlet context for context path [vaadin-8.13.0]
>> java.lang.NullPointerException: null
>> at 
>> org.ops4j.pax.web.service.internal.HttpServiceStarted.registerServlet(HttpServiceStarted.java:255)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.service.internal.HttpServiceStarted.registerResources(HttpServiceStarted.java:310)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.service.internal.HttpServiceProxy.registerResources(HttpServiceProxy.java:76)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.element.ResourceWebElement.register(ResourceWebElement.java:57)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.registerWebElement(WebApplication.java:392)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.registerWebElements(WebApplication.java:371)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.registerHttpContext(WebApplication.java:283)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.setServletContextHelper(WebApplication.java:429)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.tracker.ServletContextHelperTracker.addingService(ServletContextHelperTracker.java:173)
>>  ~[?:?]
>> at 
>> org.ops4j.pax.web.extender.whiteboard.internal.tracker.ServletContextHelperTracker.addingService(ServletContextHelperTracker.java:49)
>>  ~[?:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:943)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:871)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) 
>> ~[osgi.core-7.0.0.jar:?]
>> at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229) 
>> ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:903)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:990)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
>>  ~[?:?]
>> at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4833) ~[?:?]
>> at org.apache.felix.framework.Felix.registerService(Felix.java:3804) ~[?:?]
>> at 
>> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:328)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:501)
>>  ~[?:?]
>> at 
>> com.vaadin.osgi.resources.impl.VaadinResourceServiceImpl.start(VaadinResourceServiceImpl.java:62)
>>  ~[?:?]
>> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_202]
>> at 
>> sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
>>  ~[?:1.8.0_202]
>> at 
>> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
>>  ~[?:1.8.0_202]
>> at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_202]
>> at 
>> org.apache.felix.scr.impl.inject.methods.BaseMethod.invokeMethod(BaseMethod.java:244)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.inject.methods.BaseMethod.access$500(BaseMethod.java:41)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.inject.methods.BaseMethod$Resolved.invoke(BaseMethod.java:685)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.inject.methods.BaseMethod.invoke(BaseMethod.java:529)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:318)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.inject.methods.ActivateMethod.invoke(ActivateMethod.java:308)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.SingleComponentManager.createImplementationObject(SingleComponentManager.java:354)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.SingleComponentManager.createComponent(SingleComponentManager.java:115)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:1000)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.SingleComponentManager.getServiceInternal(SingleComponentManager.java:973)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.SingleComponentManager.getService(SingleComponentManager.java:918)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistrationImpl.java:348)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.java:248)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:362)
>>  ~[?:?]
>> at org.apache.felix.framework.Felix.getService(Felix.java:3954) ~[?:?]
>> at 
>> org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:450)
>>  ~[?:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker.addingService(ServiceTracker.java:416) 
>> ~[osgi.core-7.0.0.jar:?]
>> at 
>> com.vaadin.osgi.resources.OsgiVaadinResources$1.addingService(OsgiVaadinResources.java:80)
>>  ~[?:?]
>> at 
>> com.vaadin.osgi.resources.OsgiVaadinResources$1.addingService(OsgiVaadinResources.java:76)
>>  ~[?:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:943)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:871)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256) 
>> ~[osgi.core-7.0.0.jar:?]
>> at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229) 
>> ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:903)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.invokeServiceListenerCallback(EventDispatcher.java:990)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.fireEventImmediately(EventDispatcher.java:838)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.fireServiceEvent(EventDispatcher.java:545)
>>  ~[?:?]
>> at org.apache.felix.framework.Felix.fireServiceEvent(Felix.java:4833) ~[?:?]
>> at org.apache.felix.framework.Felix.registerService(Felix.java:3804) ~[?:?]
>> at 
>> org.apache.felix.framework.BundleContextImpl.registerService(BundleContextImpl.java:328)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:929)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:915)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:133)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:984)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:752)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractComponentManager.java:674)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:437)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:667)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:305)
>>  ~[?:?]
>> at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:554) 
>> ~[?:?]
>> at org.apache.felix.scr.impl.Activator.access$200(Activator.java:70) ~[?:?]
>> at 
>> org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:421) 
>> ~[?:?]
>> at 
>> org.apache.felix.scr.impl.AbstractExtender.createExtension(AbstractExtender.java:196)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:169)
>>  ~[?:?]
>> at 
>> org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:49)
>>  ~[?:?]
>> at 
>> org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:488)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:420)
>>  ~[osgi.core-7.0.0.jar:?]
>> at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232) 
>> ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:450)
>>  ~[osgi.core-7.0.0.jar:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.java:915)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.fireEventImmediately(EventDispatcher.java:834)
>>  ~[?:?]
>> at 
>> org.apache.felix.framework.EventDispatcher.fireBundleEvent(EventDispatcher.java:516)
>>  ~[?:?]
>> at org.apache.felix.framework.Felix.fireBundleEvent(Felix.java:4817) ~[?:?]
>> at org.apache.felix.framework.Felix.startBundle(Felix.java:2336) ~[?:?]
>> at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:998) ~[?:?]
>> at org.apache.felix.framework.BundleImpl.start(BundleImpl.java:984) ~[?:?]
>> at 
>> org.apache.karaf.features.internal.service.BundleInstallSupportImpl.startBundle(BundleInstallSupportImpl.java:165)
>>  ~[?:?]
>> at 
>> org.apache.karaf.features.internal.service.FeaturesServiceImpl.startBundle(FeaturesServiceImpl.java:1160)
>>  ~[?:?]
>> at 
>> org.apache.karaf.features.internal.service.Deployer.deploy(Deployer.java:1041)
>>  ~[?:?]
>> at 
>> org.apache.karaf.features.internal.service.FeaturesServiceImpl.doProvision(FeaturesServiceImpl.java:1069)
>>  ~[?:?]
>> at 
>> org.apache.karaf.features.internal.service.FeaturesServiceImpl.lambda$doProvisionInThread$13(FeaturesServiceImpl.java:1004)
>>  ~[?:?]
>> at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_202]
>> at 
>> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
>>  [?:1.8.0_202]
>> at 
>> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
>>  [?:1.8.0_202]
>> at java.lang.Thread.run(Thread.java:748) [?:1.8.0_202]
>> 
>> Am Mo., 3. Mai 2021 um 08:38 Uhr schrieb Jean-Baptiste Onofre 
>> <j...@nanthrax.net <mailto:j...@nanthrax.net>>:
>> Hi Richard,
>> 
>> It depends the whiteboard properties and the number of resource. I know we 
>> have an improvement to do on Pax Web about dealing with several resources 
>> locations in the same bundle. That’s maybe the issue.
>> That’s why I would like to check the way the resources are "exposed".
>> 
>> Regards
>> JB
>> 
>>> Le 3 mai 2021 à 08:27, Richard Hierlmeier <rhierlme...@googlemail.com 
>>> <mailto:rhierlme...@googlemail.com>> a écrit :
>>> 
>>> 
>>> Are you sure that this is a Vaadin and not a Karaf 4.3.1 problem? What I 
>>> can see is that the Vaadin application tries to download  
>>> http://localhost:8181/vaadin-8.12.2/VAADIN/vaadinBootstrap.js 
>>> <http://localhost:8181/vaadin-8.12.2/VAADIN/vaadinBootstrap.js>. However 
>>> this URL can not be resolved.
>>> 
>>> Shouldn't the following service provide this file?
>>> 
>>> [com.vaadin.osgi.resources.OsgiVaadinResource]
>>> ----------------------------------------------
>>>  osgi.http.whiteboard.context.select = (osgi.http.whiteboard.context.name 
>>> <http://osgi.http.whiteboard.context.name/>=com.vaadin)
>>>  osgi.http.whiteboard.resource.pattern = /VAADIN/vaadinBootstrap.js
>>>  osgi.http.whiteboard.resource.prefix = /VAADIN/vaadinBootstrap.js
>>>  service.bundleid = 237
>>>  service.id <http://service.id/> = 251
>>>  service.scope = singleton
>>> Provided by :
>>>  Vaadin Server (237)
>>> 
>>> [javax.servlet.ServletContext]
>>> ------------------------------
>>>  osgi.web.contextname = com.vaadin
>>>  osgi.web.contextpath = /vaadin-8.12.2
>>>  osgi.web.symbolicname = com.vaadin.shared
>>>  osgi.web.version = 8.12.2
>>>  service.bundleid = 238
>>>  service.id <http://service.id/> = 242
>>>  service.scope = singleton
>>> Provided by :
>>>  Vaadin Shared (238)
>>> Used by:
>>>  OPS4J Pax Web - Runtime (100)
>>> 
>>> Regards
>>> 
>>>    Richard
>>> 
>>> 
>>> 
>>> 
>>> 
>>> Am Fr., 30. Apr. 2021 um 09:27 Uhr schrieb Васил Зорев 
>>> <vassil.zore...@gmail.com <mailto:vassil.zore...@gmail.com>>:
>>> After a few restarts and version changes 8.6.0 worked for me as well.. 
>>> Please ignore my previous statement, I cannot get a consistent result yet.
>>> 
>>> На пт, 30.04.2021 г. в 9:34 ч. Jean-Baptiste Onofre <j...@nanthrax.net 
>>> <mailto:j...@nanthrax.net>> написа:
>>> Hi Alex,
>>> 
>>> Sure, you can send the archive to me.
>>> 
>>> Regards
>>> JB
>>> 
>>>> Le 30 avr. 2021 à 07:55, Alex Weirig <alex.wei...@technolink.lu 
>>>> <mailto:alex.wei...@technolink.lu>> a écrit :
>>>> 
>>>> Hello,
>>>> 
>>>> I'm pretty sure, I've been successfully running a full OSGi Vaadin > 8.6.0 
>>>> application in karaf 4.2.x.
>>>> 
>>>> The thing is, I had a fix provided by Vaadin that even allowed my to 
>>>> define the main UI class as an OSGi service and thus to even use the 
>>>> @Reference service injection in the main UI.
>>>> 
>>>> That allowed me to use my OSGi backend services in the UI and to 
>>>> dynamically compose my UI by getting references to "sub-UI" classes that 
>>>> added pages etc to my main UI. That worked really nice and again I'm sure 
>>>> that was > 8.6.0.
>>>> 
>>>> I don't know how I can send you an archive of the patched Vaadin bundle 
>>>> (can't use attachments) and I don't have github.
>>>> 
>>>> @JB: can I send you the archive?
>>>> 
>>>> 
>>>> Mat frëndleche Gréiss,
>>>> Mit freundlichen Grüßen,
>>>> Meilleures salutations,
>>>> Kind regards,
>>>> 
>>>> Alex Weirig
>>>> 
>>>> Responsable Technique
>>>> Ville de Luxembourg
>>>> Service Enseignement
>>>> Centre Technolink
>>>> 
>>>> Tel +352 4796 - 6127 <tel:+35247966127>
>>>> Fax +352 42 88 81
>>>> Email alex.wei...@technolink.lu <mailto:alex.wei...@technolink.lu>
>>>> www.vdl.lu <http://www.vdl.lu/>
>>>> 2, rue Charles de Tornaco 
>>>> L-2623 LUXEMBOURG
>>>> 
>>>> indoors.this.blesses
>>>>   <https://map.what3words.com/indoors.this.blesses>
>>>> schaufel.besten.kopie
>>>>   <https://map.what3words.com/schaufel.besten.kopie>
>>>> supposons.levage.venger
>>>>  <https://map.what3words.com/supposons.levage.venger>
>>>> On 30/04/2021 06:38, Jean-Baptiste Onofre wrote:
>>>>> Hi,
>>>>> 
>>>>> It looks like a regression in Vaadin 8.6.0.
>>>>> 
>>>>> I will try to take a look next week.
>>>>> 
>>>>> Regards
>>>>> JB
>>>>> 
>>>>>> Le 29 avr. 2021 à 22:03, Васил Зорев <vassil.zore...@gmail.com 
>>>>>> <mailto:vassil.zore...@gmail.com>> a écrit :
>>>>>> 
>>>>>> Does not seem that it was intentional, newer Vaadin 8 release notes say 
>>>>>> there were "improvements in OSGi support".
>>>>>> 
>>>>>> In my tests on Karaf 4.3.2-SNAPSHOT the last working version is 8.5.2, 
>>>>>> it broke with 8.6.0. Possibly with 
>>>>>> https://github.com/vaadin/framework/commit/7e89b5e3348be487110bd8a5c60336ff363cf9d6
>>>>>>  
>>>>>> <https://github.com/vaadin/framework/commit/7e89b5e3348be487110bd8a5c60336ff363cf9d6>
>>>>>>  ,
>>>>>> although not sure about it. I would suggest to ask on the Vaadin forums 
>>>>>> as well, just in case.
>>>>>> 
>>>>>> На чт, 29.04.2021 г. в 14:30 ч. Richard Hierlmeier 
>>>>>> <rhierlme...@googlemail.com <mailto:rhierlme...@googlemail.com>> написа:
>>>>>> I have to port a Vaadin 7 applikation to Vaadin 8, so I planned to used 
>>>>>> the newest one (8.12.2 or 8.13.0).
>>>>>> 
>>>>>> I found a workaround for the problem.
>>>>>> When the Vaadin Servlet that hosts the UI has "/VAADIN/*" in the 
>>>>>> URL-Patterns, then the Servlet is called when static resource files from 
>>>>>> /VAADIN are requested.
>>>>>> You can overwride then in the VaadinServlet the findResourceURL method 
>>>>>> and you can search for all OsgiVaadinResource services an ask them for 
>>>>>> the resources.
>>>>>> 
>>>>>> Can it be that Vaadin dropped the OSGI support for Vaadin 8.
>>>>>> 
>>>>>> Regards
>>>>>> 
>>>>>>   Richard
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> Am Mi., 28. Apr. 2021 um 23:39 Uhr schrieb Васил Зорев 
>>>>>> <vassil.zore...@gmail.com <mailto:vassil.zore...@gmail.com>>:
>>>>>> What Vaadin version do you depend on ? I deployed locally the app by 
>>>>>> Peter Lehto - https://github.com/peterl1084/vaadin-karaf 
>>>>>> <https://github.com/peterl1084/vaadin-karaf> and observed something kind 
>>>>>> of strange.
>>>>>> 
>>>>>> Karaf version is 4.3.2-SNAPSHOT (from 2-3 weeks ago).
>>>>>> 
>>>>>> On Vaadin version 8.3.0, going to http://localhost:8181/myapp 
>>>>>> <http://localhost:8181/myapp> showed the expected view. (however 
>>>>>> vaadin-osgi-integration was 8.13.0 in the pom at that time, by mistake..)
>>>>>> 
>>>>>> I then changed to Vaadin 8.13.0 and got the same error as you did:
>>>>>> Failed to load resource: the server responded with a status of 404 (Not 
>>>>>> Found) 
>>>>>> http://localhost:8181/vaadin-8.13.0/VAADIN/vaadinBootstrap.js?v=8.13.0 
>>>>>> <http://localhost:8181/vaadin-8.13.0/VAADIN/vaadinBootstrap.js?v=8.13.0>
>>>>>> myapp:21 Uncaught ReferenceError: vaadin is not defined
>>>>>>     at myapp:21
>>>>>> vaadin-8.13.0/VAADIN/themes/valo/favicon.ico:1 Failed to load resource: 
>>>>>> the server responded with a status of 404 (Not Found) 
>>>>>> http://localhost:8181/vaadin-8.13.0/VAADIN/themes/valo/favicon.ico 
>>>>>> <http://localhost:8181/vaadin-8.13.0/VAADIN/themes/valo/favicon.ico>
>>>>>> 
>>>>>> Funny enough, changing back to 8.3.0 got it running again... I leave it 
>>>>>> for now, but will try to figure something out these days.
>>>>>> 
>>>>>> Regards,
>>>>>> Vassil
>>>>>> 
>>>>>> На ср, 28.04.2021 г. в 20:03 ч. Васил Зорев <vassil.zore...@gmail.com 
>>>>>> <mailto:vassil.zore...@gmail.com>> написа:
>>>>>> Hi Richard,
>>>>>> 
>>>>>> I cannot give an answer yet as I have no idea yet, but we are currently 
>>>>>> running a Vaadin 7 app on Karaf 4.3.1 in my work environment so I would 
>>>>>> be very interested to have a look into your issue.
>>>>>> 
>>>>>> A few questions. Are you using "stock" Karaf 4.3.1 or you forked it and 
>>>>>> built your own? Can you please provide a sample Vaadin 8 app (the 
>>>>>> minimal possible version) that reproduces the error you get that I can 
>>>>>> deploy locally? How do you deploy the app to Karaf? Also if needed 
>>>>>> please provide a sample web descriptor file (if you don't use 
>>>>>> annotations).
>>>>>> 
>>>>>> Regards,
>>>>>> Vassil
>>>>>> 
>>>>>> На ср, 28.04.2021 г. в 10:50 ч. Richard Hierlmeier 
>>>>>> <rhierlme...@googlemail.com <mailto:rhierlme...@googlemail.com>> написа:
>>>>>> 
>>>>>> I try to get a simple Vaadin 8 application running on Karaf 4.3.1.
>>>>>> However it is not working. Vaadin can not load it's bootstrap Javascript 
>>>>>> File. At the very beginning the Vaadin application makes an
>>>>>> http request to  http://localhost:8181/VAADIN/vaadinBootstrap.js 
>>>>>> <http://localhost:8181/VAADIN/vaadinBootstrap.js>
>>>>>> Karaf answers with an error code 404 (not found).
>>>>>> 
>>>>>> The Vaadin OSGI integration registers it's static resources with 
>>>>>> http-whiteboard.
>>>>>> The http:list <http://list/> shows that the patterns are known:
>>>>>> 
>>>>>> karaf@root()> http:list <http://list/>
>>>>>> ID  | Servlet             | Servlet-Name                                 
>>>>>>    | State       | Alias                                               | 
>>>>>> Url
>>>>>> ----+---------------------+-------------------------------------------------+-------------+-----------------------------------------------------+------------------------------------------------------
>>>>>> 176 | CXFNonSpringServlet | cxf-osgi-transport-servlet                   
>>>>>>    | Deployed    | /cxf                                                | 
>>>>>> [/cxf/*]
>>>>>> 238 | ResourceServlet     | txt                                          
>>>>>>    | Deployed    | /VAADIN/test.txt                                    | 
>>>>>> [/VAADIN/test.txt/*]
>>>>>> 238 | ResourceServlet     | 
>>>>>> /VAADIN/themes/mytheme/*:/VAADIN/themes/mytheme | Deployed    | 
>>>>>> /VAADIN/themes/mytheme/*                            | 
>>>>>> [/VAADIN/themes/mytheme/*]
>>>>>> 238 | ResourceServlet     | /VAADIN/themes/valo/*:/VAADIN/themes/valo    
>>>>>>    | Deployed    | /VAADIN/themes/valo/*                               | 
>>>>>> [/VAADIN/themes/valo/*]
>>>>>> 238 | ResourceServlet     | gz                                           
>>>>>>    | Deployed    | /VAADIN/vaadinBootstrap.js.gz                       | 
>>>>>> [/VAADIN/vaadinBootstrap.js.gz/*]
>>>>>> 238 | ResourceServlet     | js                                           
>>>>>>    | Deployed    | /VAADIN/vaadinBootstrap.js                          | 
>>>>>> [/VAADIN/vaadinBootstrap.js/*]
>>>>>> 238 | ResourceServlet     | gz                                           
>>>>>>    | Deployed    | /VAADIN/vaadinPush.debug.js.gz                      | 
>>>>>> [/VAADIN/vaadinPush.debug.js.gz/*]
>>>>>> 238 | ResourceServlet     | js                                           
>>>>>>    | Deployed    | /VAADIN/vaadinPush.debug.js                         | 
>>>>>> [/VAADIN/vaadinPush.debug.js/*]
>>>>>> 238 | ResourceServlet     | gz                                           
>>>>>>    | Deployed    | /VAADIN/vaadinPush.js.gz                            | 
>>>>>> [/VAADIN/vaadinPush.js.gz/*]
>>>>>> 238 | ResourceServlet     | js                                           
>>>>>>    | Deployed    | /VAADIN/vaadinPush.js                               | 
>>>>>> [/VAADIN/vaadinPush.js/*]
>>>>>> 238 | ResourceServlet     | DefaultWidgetSet                             
>>>>>>    | Deployed    | /VAADIN/widgetsets/com.vaadin.DefaultWidgetSet/*    | 
>>>>>> [/VAADIN/widgetsets/com.vaadin.DefaultWidgetSet/*]
>>>>>> 238 | ResourceServlet     | Vaadin7WidgetSet                             
>>>>>>    | Deployed    | /VAADIN/widgetsets/com.vaadin.v7.Vaadin7WidgetSet/* | 
>>>>>> [/VAADIN/widgetsets/com.vaadin.v7.Vaadin7WidgetSet/*]
>>>>>> 
>>>>>> I debugged the http request to  /VAADIN/vaadinBootstrap.js in the 
>>>>>> ResourceServlet from pax-web-jetty and found out that the 
>>>>>> ResourceServlet has the wrong HttpContext. 
>>>>>> It is using the one from CXF and not the from the Vaadin bundle.
>>>>>> 
>>>>>> karaf@root()>  la -u | grep 176
>>>>>> 176 | Active   |  40 | 3.4.3                      | 
>>>>>> mvn:org.apache.cxf/cxf-rt-transports-http/3.4.3
>>>>>> 
>>>>>> When the bundle with ID 176 ( cxf-rt-transports-http) is stopped then 
>>>>>> the resource /VAADIN/vaadinBoostrap.js is still not found, but I do no 
>>>>>> longer reach the breakpoint in the pax-web-jetty ResourceServlet
>>>>>> 
>>>>>> The OSGI service that should bring the /VAADIN/boostrap.js resource has 
>>>>>> the following properties:
>>>>>> 
>>>>>> [com.vaadin.osgi.resources.OsgiVaadinResource]
>>>>>> ----------------------------------------------
>>>>>>  osgi.http.whiteboard.context.select = 
>>>>>> (osgi.http.whiteboard.context.name 
>>>>>> <http://osgi.http.whiteboard.context.name/>=com.vaadin)
>>>>>>  osgi.http.whiteboard.resource.pattern = /VAADIN/vaadinBootstrap.js
>>>>>>  osgi.http.whiteboard.resource.prefix = /VAADIN/vaadinBootstrap.js
>>>>>>  service.bundleid = 237
>>>>>>  service.id <http://service.id/> = 251
>>>>>>  service.scope = singleton
>>>>>> Provided by :
>>>>>>  Vaadin Server (237)
>>>>>> 
>>>>>> The ServletContext with name com.vaadin has the following properties:
>>>>>> 
>>>>>> [javax.servlet.ServletContext]
>>>>>> ------------------------------
>>>>>>  osgi.web.contextname = com.vaadin
>>>>>>  osgi.web.contextpath = /vaadin-8.12.2
>>>>>>  osgi.web.symbolicname = com.vaadin.shared
>>>>>>  osgi.web.version = 8.12.2
>>>>>>  service.bundleid = 238
>>>>>>  service.id <http://service.id/> = 242
>>>>>>  service.scope = singleton
>>>>>> Provided by :
>>>>>>  Vaadin Shared (238)
>>>>>> Used by:
>>>>>>  OPS4J Pax Web - Runtime (100)
>>>>>> 
>>>>>> I have the following http-white-board feature installed:
>>>>>> 
>>>>>> karaf@root()> feature:list | grep -i white
>>>>>> pax-web-http-whiteboard           | 7.3.13           |          | 
>>>>>> Uninstalled | standard-4.3.1                    | Pax Web OSGi HTTP 
>>>>>> Whiteboard support
>>>>>> http-whiteboard                   | 7.3.13           |          | 
>>>>>> Uninstalled | standard-4.3.1                    | Transition feature for 
>>>>>> backward compatibility
>>>>>> pax-http-whiteboard               | 7.3.13           |          | 
>>>>>> Started     | org.ops4j.pax.web-7.3.13          | Provide HTTP 
>>>>>> Whiteboard pattern support
>>>>>> 
>>>>>> I tried also the following http requests:
>>>>>> 
>>>>>> http://localhost:8181/vaadin-8.12.2/VAADIN/vaadinBootstrap.js 
>>>>>> <http://localhost:8181/vaadin-8.12.2/VAADIN/vaadinBootstrap.js>
>>>>>> http://localhost:8181/vaadin-8.12.2/vaadinBootstrap.js 
>>>>>> <http://localhost:8181/vaadin-8.12.2/vaadinBootstrap.js>  
>>>>>> http://localhost:8181/VAADIN/vaadinBootstrap.js 
>>>>>> <http://localhost:8181/VAADIN/vaadinBootstrap.js>  
>>>>>> 
>>>>>> All end up with an 404.
>>>>>> 
>>>>>> What is wrong in my setup?
>>>>>> 
>>>>>> Regards 
>>>>>> 
>>>>>>   Richard
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>>> 
>>>>> 
>>>> <alex_weirig.vcf>
>>> 
>> 
> 

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