After Inplace upgrade of AEM from 6.3 to 6.5, Servlets as a component are in satisfied state in Felix console. Below is the error in logs.
13.11.2019 15:25:29.241 *ERROR* [FelixDispatchQueue] org.apache.sling.servlets.resolver FrameworkEvent ERROR (org.osgi.framework.ServiceException: Service factory returned null. (Component: com.isobar.sony.rewards.servlet.UniqueCodeCheckNameServlet (3755)))
org.osgi.framework.ServiceException: Service factory returned null. (Component: com.isobar.sony.rewards.servlet.UniqueCodeCheckNameServlet (3755))
at org.apache.felix.framework.ServiceRegistrationImpl.getFactoryUnchecked(ServiceRegistratio nImpl.java:381)
at org.apache.felix.framework.ServiceRegistrationImpl.getService(ServiceRegistrationImpl.jav a:248)
at org.apache.felix.framework.ServiceRegistry.getService(ServiceRegistry.java:350)
at org.apache.felix.framework.Felix.getService(Felix.java:3954)
at org.apache.felix.framework.BundleContextImpl.getService(BundleContextImpl.java:450)
at org.apache.felix.scr.impl.manager.SingleRefPair.getServiceObject(SingleRefPair.java:86) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.inject.BindParameters.getServiceObject(BindParameters.java:47) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.inject.methods.BindMethod.getServiceObject(BindMethod.java:664) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.DependencyManager.getServiceObject(DependencyManager.ja va:2308) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.DependencyManager.doInvokeBindMethod(DependencyManager. java:1805) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.DependencyManager.invokeBindMethod(DependencyManager.ja va:1788) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.SingleComponentManager.invokeBindMethod(SingleComponent Manager.java:435) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedServic e(DependencyManager.java:325) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.DependencyManager$MultipleDynamicCustomizer.addedServic e(DependencyManager.java:294) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.j ava:1216) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.customizerAdded(ServiceTracker.j ava:1137) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.trackAdding(ServiceTrack er.java:944) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.ServiceTracker$AbstractTracked.track(ServiceTracker.jav a:880) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.ServiceTracker$Tracked.serviceChanged(ServiceTracker.ja va:1168) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.BundleComponentActivator$ListenerInfo.serviceChanged(BundleComp onentActivator.java:125) [org.apache.felix.scr:2.1.16]
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(AbstractComponentMa nager.java:906) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.AbstractComponentManager$3.register(AbstractComponentMa nager.java:892) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.RegistrationManager.changeRegistration(RegistrationMana ger.java:128) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.registerService(AbstractCompon entManager.java:959) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.activateInternal(AbstractCompo nentManager.java:732) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enableInternal(AbstractCompone ntManager.java:666) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.AbstractComponentManager.enable(AbstractComponentManage r.java:432) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.manager.ConfigurableComponentHolder.enableComponents(Configurab leComponentHolder.java:665) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.BundleComponentActivator.initialEnable(BundleComponentActivator .java:338) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.Activator.loadComponents(Activator.java:382) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.Activator.access$200(Activator.java:49) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.Activator$ScrExtension.start(Activator.java:264) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.AbstractExtender.createExtension(AbstractExtender.java:196) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:169) [org.apache.felix.scr:2.1.16]
at org.apache.felix.scr.impl.AbstractExtender.modifiedBundle(AbstractExtender.java:49) [org.apache.felix.scr:2.1.16]
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:488)
at org.osgi.util.tracker.BundleTracker$Tracked.customizerModified(BundleTracker.java:420)
at org.osgi.util.tracker.AbstractTracked.track(AbstractTracked.java:232)
at org.osgi.util.tracker.BundleTracker$Tracked.bundleChanged(BundleTracker.java:450)
at org.apache.felix.framework.EventDispatcher.invokeBundleListenerCallback(EventDispatcher.j ava: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.felix.webconsole.internal.core.InstallHelper.doRun(InstallHelper.java:67) [org.apache.felix.webconsole:4.3.8]
at org.apache.felix.webconsole.internal.core.BaseUpdateInstallHelper.doRun(BaseUpdateInstall Helper.java:99) [org.apache.felix.webconsole:4.3.8]
at org.apache.felix.webconsole.internal.core.BaseUpdateInstallHelper.run(BaseUpdateInstallHe lper.java:171) [org.apache.felix.webconsole:4.3.8]
Is someone also encountered with the same issue after upgrade to AEM 6.5? Any help will be appreciated.