Hello,
We are using pax-web-extender-whiteboard 7.2.4 on equinox and I have a few
error page servlet annotated as followed:
@Component(
service = Servlet.class,
property = {
HttpWhiteboardConstants.HTTP_WHITEBOARD_SERVLET_NAME + "=Error403Servlet",
"alias=/error403",
"osgi.http.whiteboard.servlet.errorPage=403",
"osgi.http.whiteboard.context.select=(osgi.http.whiteboard.context.name=WebviewerServletContextHelper)"
},
scope = ServiceScope.PROTOTYPE
)
public final class Error403Servlet extends HttpServlet {...}
However, sometimes when we start the server, we got this error:
java.lang.IllegalArgumentException
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+illegalargumentexception>:
Error
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+error>
page for [403] already registered.
at
org.ops4j.pax.web.service.spi.model.ServiceModel.addErrorPageModel(ServiceModel.java:315)
at
org.ops4j.pax.web.service.internal.HttpServiceStarted.registerErrorPage(HttpServiceStarted.java:961)
at
org.ops4j.pax.web.service.internal.HttpServiceProxy.registerErrorPage(HttpServiceProxy.java:343)
at
org.ops4j.pax.web.extender.whiteboard.internal.element.ServletWebElement.register(ServletWebElement.java:107)
at
org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.registerWebElement(WebApplication.java:392)
at java.util.stream.ForEachOps$ForEachOp$OfRef.accept(Unknown Source)
at java.util.stream.ReferencePipeline$2$1.accept(Unknown Source)
at java.util.ArrayList
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+arraylist>$ArrayListSpliterator.forEachRemaining(Unknown
Source)
at java.util.stream.AbstractPipeline.copyInto(Unknown Source)
at java.util.stream.AbstractPipeline.wrapAndCopyInto(Unknown Source)
at java.util.stream.ForEachOps$ForEachOp.evaluateSequential(Unknown
Source)
at
java.util.stream.ForEachOps$ForEachOp$OfRef.evaluateSequential(Unknown Source)
at java.util.stream.AbstractPipeline.evaluate(Unknown Source)
at java.util.stream.ReferencePipeline.forEach(Unknown Source)
at
org.ops4j.pax.web.extender.whiteboard.internal.WebApplication.addWebElement(WebApplication.java:170)
at
org.ops4j.pax.web.extender.whiteboard.internal.tracker.AbstractTracker.addingService(AbstractTracker.java:193)
at
org.ops4j.pax.web.extender.whiteboard.internal.tracker.AbstractTracker.addingService(AbstractTracker.java:46)
at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:941)
at
org.osgi.util.tracker.ServiceTracker$Tracked.customizerAdding(ServiceTracker.java:1)
at
org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229)
at
org.osgi.util.tracker.ServiceTracker$Tracked.serviceChanged(ServiceTracker.java:901)
at
org.eclipse.osgi.internal.serviceregistry.FilteredServiceListener.serviceChanged(FilteredServiceListener.java:109)
at
org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:920)
at
org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at
org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at
org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEventPrivileged(ServiceRegistry.java:862)
at
org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.publishServiceEvent(ServiceRegistry.java:801)
at
org.eclipse.osgi.internal.serviceregistry.ServiceRegistrationImpl.register(ServiceRegistrationImpl.java:127)
at
org.eclipse.osgi.internal.serviceregistry.ServiceRegistry.registerService(ServiceRegistry.java:225)
at
org.eclipse.osgi.internal.framework.BundleContextImpl.registerService(BundleContextImpl.java:469)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:887)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentManager.java:874)
at
org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationManager.java:132)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractComponentManager.java:941)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractComponentManager.java:741)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractComponentManager.java:675)
at
org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManager.java:430)
at
org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(ConfigurableComponentHolder.java:657)
at
org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator.java:341)
at org.apache.felix.scr.impl.Activator
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+activator>.loadComponents(Activator
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+activator>.java:390)
at org.apache.felix.scr.impl.Activator
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+activator>.access$200(Activator
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+activator>.java:54)
at org.apache.felix.scr.impl.Activator
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+activator>$ScrExtension.start(Activator
<http://www.google.com/search?hl=en&q=allinurl%3Adocs.oracle.com+javase+docs+api+activator>.java:265)
at
org.apache.felix.utils.extender.AbstractExtender.createExtension(AbstractExtender.java:254)
at
org.apache.felix.utils.extender.AbstractExtender.modifiedBundle(AbstractExtender.java:227)
at
org.apache.felix.utils.extender.AbstractExtender.addingBundle(AbstractExtender.java:187)
at
org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:469)
at
org.osgi.util.tracker.BundleTracker$Tracked.customizerAdding(BundleTracker.java:1)
at
org.osgi.util.tracker.AbstractTracked.trackAdding(AbstractTracked.java:256)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:229)
at
org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:444)
at
org.eclipse.osgi.internal.framework.BundleContextImpl.dispatchEvent(BundleContextImpl.java:908)
at
org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at
org.eclipse.osgi.framework.eventmgr.ListenerQueue.dispatchEventSynchronous(ListenerQueue.java:148)
at
org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEventPrivileged(EquinoxEventPublisher.java:213)
at
org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:120)
at
org.eclipse.osgi.internal.framework.EquinoxEventPublisher.publishBundleEvent(EquinoxEventPublisher.java:112)
at
org.eclipse.osgi.internal.framework.EquinoxContainerAdaptor.publishModuleEvent(EquinoxContainerAdaptor.java:168)
at org.eclipse.osgi.container.Module.publishEvent(Module.java:476)
at org.eclipse.osgi.container.Module.doStart(Module.java:578)
at org.eclipse.osgi.container.Module.start(Module.java:449)
at
org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1628)
at
org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.incStartLevel(ModuleContainer.java:1608)
at
org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.doContainerStartLevel(ModuleContainer.java:1579)
at
org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1522)
at
org.eclipse.osgi.container.ModuleContainer$ContainerStartLevel.dispatchEvent(ModuleContainer.java:1)
at
org.eclipse.osgi.framework.eventmgr.EventManager.dispatchEvent(EventManager.java:230)
at
org.eclipse.osgi.framework.eventmgr.EventManager$EventThread.run(EventManager.java:340)
Since the error page is working fine despite this exception, is it a race
condition in the service registry that cause this exception? Should this be
reported as bug on pax-web or felix scr? We tried to upgrade to pax-web
7.2.10 but still got the same error from time to time
Thai Le
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