org.xml.sax.SAXNotRecognizedException: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized

Issue

The following warning is displayed in the Fuse logs:

2020-11-04 11:32:25,212 | WARN  |  Event Dispatcher: 1 | o.a.c.p.v.SchemaReader           | 62 - org.apache.camel.camel-core - 2.21.0.fuse-770013-redhat-00001 | Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
org.xml.sax.SAXNotRecognizedException: Property 'http://javax.xml.XMLConstants/property/accessExternalDTD' is not recognized.
    at org.apache.xerces.jaxp.validation.XMLSchemaFactory.setProperty(Unknown Source) ~[?:?]
    at org.apache.camel.processor.validation.SchemaReader.createSchemaFactory(SchemaReader.java:179) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.validation.SchemaReader.getSchemaFactory(SchemaReader.java:152) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.validation.SchemaReader.createSchema(SchemaReader.java:192) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.validation.SchemaReader.loadSchema(SchemaReader.java:84) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.component.validator.ValidatorEndpoint.createProducer(ValidatorEndpoint.java:119) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.ProducerCache.doGetProducer(ProducerCache.java:560) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.ProducerCache.acquireProducer(ProducerCache.java:168) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.SendProcessor.doStart(SendProcessor.java:248) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:75) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:60) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:104) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:90) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.interceptor.DefaultChannel.doStart(DefaultChannel.java:160) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:75) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:60) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:104) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:62) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:104) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:90) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.MulticastProcessor.doStart(MulticastProcessor.java:1186) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:75) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:60) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:104) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:90) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.TryProcessor.doStart(TryProcessor.java:163) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:75) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:60) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:104) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:90) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.interceptor.DefaultChannel.doStart(DefaultChannel.java:160) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:75) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:60) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:104) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startServices(ServiceHelper.java:90) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.processor.DelegateAsyncProcessor.doStart(DelegateAsyncProcessor.java:80) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.util.ServiceHelper.startService(ServiceHelper.java:75) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.RouteService.startChildService(RouteService.java:370) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.RouteService.doWarmUp(RouteService.java:196) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.RouteService.warmUp(RouteService.java:145) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.doWarmUpRoutes(DefaultCamelContext.java:3947) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.safelyStartRouteServices(DefaultCamelContext.java:3854) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.doStartOrResumeRoutes(DefaultCamelContext.java:3640) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.doStartCamel(DefaultCamelContext.java:3492) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.access$000(DefaultCamelContext.java:209) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext$2.call(DefaultCamelContext.java:3251) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext$2.call(DefaultCamelContext.java:3247) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.doWithDefinedClassLoader(DefaultCamelContext.java:3270) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.doStart(DefaultCamelContext.java:3247) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.support.ServiceSupport.start(ServiceSupport.java:61) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.impl.DefaultCamelContext.start(DefaultCamelContext.java:3163) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.blueprint.BlueprintCamelContext.start(BlueprintCamelContext.java:248) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.blueprint.BlueprintCamelContext.maybeStart(BlueprintCamelContext.java:290) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.camel.blueprint.BlueprintCamelContext.blueprintEvent(BlueprintCamelContext.java:188) [!/:2.21.0.fuse-770013-redhat-00001]
    at org.apache.aries.blueprint.container.BlueprintEventDispatcher$3.call(BlueprintEventDispatcher.java:190) [!/:1.10.2]
    at org.apache.aries.blueprint.container.BlueprintEventDispatcher$3.call(BlueprintEventDispatcher.java:188) [!/:1.10.2]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_272]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_272]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_272]
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511) [?:1.8.0_272]
    at java.util.concurrent.FutureTask.run(FutureTask.java:266) [?:1.8.0_272]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$201(ScheduledThreadPoolExecutor.java:180) [?:1.8.0_272]
    at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:293) [?:1.8.0_272]
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [?:1.8.0_272]
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [?:1.8.0_272]
    at java.lang.Thread.run(Thread.java:748) [?:1.8.0_272]