Merge branch '2.1.x'

Closes gh-18882

Author: wilkinsona

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscoverer.java

@@ -424,7 +424,7 @@ Set<ExtensionBean> getExtensions() {
 		}
 
 		private Class<?> getFilter(Class<?> type) {
-			return MergedAnnotations.from(type).get(FilteredEndpoint.class)
+			return MergedAnnotations.from(type, SearchStrategy.TYPE_HIERARCHY).get(FilteredEndpoint.class)
 					.getValue(MergedAnnotation.VALUE, Class.class).orElse(null);
 		}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/annotation/EndpointDiscovererTests.java

@@ -209,7 +209,8 @@ void getEndpointsWhenHasSpecializedFiltersInSpecializedDiscovererShouldNotFilter
 		load(SpecializedEndpointsConfiguration.class, (context) -> {
 			SpecializedEndpointDiscoverer discoverer = new SpecializedEndpointDiscoverer(context);
 			Map<EndpointId, SpecializedExposableEndpoint> endpoints = mapEndpoints(discoverer.getEndpoints());
-			assertThat(endpoints).containsOnlyKeys(EndpointId.of("test"), EndpointId.of("specialized"));
+			assertThat(endpoints).containsOnlyKeys(EndpointId.of("test"), EndpointId.of("specialized"),
+					EndpointId.of("specialized-superclass"));
 		});
 	}
 
@@ -252,7 +253,7 @@ void getEndpointsShouldApplyFilters() {
 		load(SpecializedEndpointsConfiguration.class, (context) -> {
 			EndpointFilter<SpecializedExposableEndpoint> filter = (endpoint) -> {
 				EndpointId id = endpoint.getEndpointId();
-				return !id.equals(EndpointId.of("specialized"));
+				return !id.equals(EndpointId.of("specialized")) && !id.equals(EndpointId.of("specialized-superclass"));
 			};
 			SpecializedEndpointDiscoverer discoverer = new SpecializedEndpointDiscoverer(context,
 					Collections.singleton(filter));
@@ -401,7 +402,8 @@ TestEndpoint scopedTargetTestEndpoint() {
 
 	}
 
-	@Import({ TestEndpoint.class, SpecializedTestEndpoint.class, SpecializedExtension.class })
+	@Import({ TestEndpoint.class, SpecializedTestEndpoint.class, SpecializedSuperclassTestEndpoint.class,
+			SpecializedExtension.class })
 	static class SpecializedEndpointsConfiguration {
 
 	}
@@ -494,6 +496,20 @@ Object getAll() {
 
 	}
 
+	@SpecializedEndpoint(id = "specialized-superclass")
+	static class AbstractFilteredEndpoint {
+
+	}
+
+	static class SpecializedSuperclassTestEndpoint extends AbstractFilteredEndpoint {
+
+		@ReadOperation
+		public Object getAll() {
+			return null;
+		}
+
+	}
+
 	static class SubSpecializedTestEndpoint extends SpecializedTestEndpoint {
 
 		@ReadOperation