YARN-7941. Transitive dependencies for component are not resolved. Contributed by Billie Rinaldi.

(cherry picked from commit c0487110990958fa985d273eb178bdf76002cf3a)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/main/java/org/apache/hadoop/yarn/service/component/Component.java

@@ -164,6 +164,7 @@ public class Component implements EventHandler<ComponentEvent> {
     maxContainerFailurePerComp = componentSpec.getConfiguration()
         .getPropertyInt(CONTAINER_FAILURE_THRESHOLD, 10);
     createNumCompInstances(component.getNumberOfContainers());
+    setDesiredContainers(component.getNumberOfContainers().intValue());
   }
 
   private void createNumCompInstances(long count) {

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-applications/hadoop-yarn-services/hadoop-yarn-services-core/src/test/java/org/apache/hadoop/yarn/service/TestYarnNativeServices.java

@@ -137,7 +137,9 @@ public class TestYarnNativeServices extends ServiceTestUtils {
 
   // Create compa with 2 containers
   // Create compb with 2 containers which depends on compa
-  // Check containers for compa started before containers for compb
+  // Create compc with 2 containers which depends on compb
+  // Check containers for compa started before containers for compb before
+  // containers for compc
   @Test (timeout = 200000)
   public void testComponentStartOrder() throws Exception {
     setupInternal(NUM_NMS);
@@ -146,17 +148,23 @@ public class TestYarnNativeServices extends ServiceTestUtils {
     exampleApp.setName("teststartorder");
     exampleApp.setVersion("v1");
     exampleApp.addComponent(createComponent("compa", 2, "sleep 1000"));
-    Component compb = createComponent("compb", 2, "sleep 1000");
 
-    // Let compb depedends on compa;
+    // Let compb depend on compa
+    Component compb = createComponent("compb", 2, "sleep 1000");
     compb.setDependencies(Collections.singletonList("compa"));
     exampleApp.addComponent(compb);
 
+    // Let compc depend on compb
+    Component compc = createComponent("compc", 2, "sleep 1000");
+    compc.setDependencies(Collections.singletonList("compb"));
+    exampleApp.addComponent(compc);
+
     client.actionCreate(exampleApp);
     waitForServiceToBeStable(client, exampleApp);
 
     // check that containers for compa are launched before containers for compb
-    checkContainerLaunchDependencies(client, exampleApp, "compa", "compb");
+    checkContainerLaunchDependencies(client, exampleApp, "compa", "compb",
+        "compc");
 
     client.actionStop(exampleApp.getName(), true);
     client.actionDestroy(exampleApp.getName());