Fix #4531

extensions/smallrye-health/deployment/src/main/java/io/quarkus/smallrye/health/deployment/SmallRyeHealthProcessor.java

@@ -29,6 +29,7 @@
 import io.quarkus.smallrye.health.runtime.SmallRyeLivenessHandler;
 import io.quarkus.smallrye.health.runtime.SmallRyeReadinessHandler;
 import io.quarkus.vertx.http.deployment.RouteBuildItem;
+import io.quarkus.vertx.http.runtime.HandlerType;
 import io.smallrye.health.SmallRyeHealthReporter;
 
 class SmallRyeHealthProcessor {
@@ -91,11 +92,13 @@ void build(SmallRyeHealthRecorder recorder, RecorderContext recorderContext,
         feature.produce(new FeatureBuildItem(FeatureBuildItem.SMALLRYE_HEALTH));
 
         // Register the health handler
-        routes.produce(new RouteBuildItem(health.rootPath, new SmallRyeHealthHandler()));
+        routes.produce(new RouteBuildItem(health.rootPath, new SmallRyeHealthHandler(), HandlerType.BLOCKING));
         routes.produce(
-                new RouteBuildItem(health.rootPath + health.livenessPath, new SmallRyeLivenessHandler()));
+                new RouteBuildItem(health.rootPath + health.livenessPath, new SmallRyeLivenessHandler(),
+                        HandlerType.BLOCKING));
         routes.produce(
-                new RouteBuildItem(health.rootPath + health.readinessPath, new SmallRyeReadinessHandler()));
+                new RouteBuildItem(health.rootPath + health.readinessPath, new SmallRyeReadinessHandler(),
+                        HandlerType.BLOCKING));
 
         // Make ArC discover the beans marked with the @Health qualifier
         beanDefiningAnnotation.produce(new BeanDefiningAnnotationBuildItem(HEALTH));

extensions/smallrye-health/deployment/src/test/java/io/quarkus/smallrye/health/test/DispatchedThreadTest.java

@@ -0,0 +1,70 @@
+package io.quarkus.smallrye.health.test;
+
+import static org.hamcrest.Matchers.contains;
+import static org.hamcrest.Matchers.is;
+import static org.hamcrest.Matchers.not;
+import static org.hamcrest.Matchers.stringContainsInOrder;
+
+import javax.enterprise.context.ApplicationScoped;
+
+import org.eclipse.microprofile.health.HealthCheck;
+import org.eclipse.microprofile.health.HealthCheckResponse;
+import org.eclipse.microprofile.health.Liveness;
+import org.eclipse.microprofile.health.Readiness;
+import org.jboss.shrinkwrap.api.ShrinkWrap;
+import org.jboss.shrinkwrap.api.asset.EmptyAsset;
+import org.jboss.shrinkwrap.api.spec.JavaArchive;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.extension.RegisterExtension;
+
+import io.quarkus.test.QuarkusUnitTest;
+import io.restassured.RestAssured;
+
+public class DispatchedThreadTest {
+
+    @RegisterExtension
+    static final QuarkusUnitTest config = new QuarkusUnitTest()
+            .setArchiveProducer(() -> ShrinkWrap.create(JavaArchive.class)
+                    .addClasses(LivenessHealthCheckCapturingThread.class, ReadinessHealthCheckCapturingThread.class)
+                    .addAsManifestResource(EmptyAsset.INSTANCE, "beans.xml"));
+
+    @Test
+    public void check() {
+        RestAssured.when().get("/health/live").then()
+                .body("status", is("UP"),
+                        "checks.status", contains("UP"),
+                        "checks.name", contains("my-liveness-check"),
+                        "checks.data.thread[0]", stringContainsInOrder("worker"),
+                        "checks.data.thread[0]", not(stringContainsInOrder("loop")));
+
+        RestAssured.when().get("/health/ready").then()
+                .body("status", is("UP"),
+                        "checks.status", contains("UP"),
+                        "checks.name", contains("my-readiness-check"),
+                        "checks.data.thread[0]", stringContainsInOrder("worker"),
+                        "checks.data.thread[0]", not(stringContainsInOrder("loop")));
+    }
+
+    @ApplicationScoped
+    @Liveness
+    public static class LivenessHealthCheckCapturingThread implements HealthCheck {
+        @Override
+        public HealthCheckResponse call() {
+            return HealthCheckResponse.named("my-liveness-check")
+                    .up()
+                    .withData("thread", Thread.currentThread().getName()).build();
+        }
+    }
+
+    @ApplicationScoped
+    @Readiness
+    public static class ReadinessHealthCheckCapturingThread implements HealthCheck {
+        @Override
+        public HealthCheckResponse call() {
+            return HealthCheckResponse.named("my-readiness-check")
+                    .up()
+                    .withData("thread", Thread.currentThread().getName()).build();
+        }
+    }
+
+}