YARN-10438. Handle null containerId in ClientRMService#getContainerReport() (#2313)

Co-authored-by: Shubham Gupta <gshubham@microsoft.com>
(cherry picked from commit e3cd627069c7d35b4638af3f2299a248eeca3923)

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ClientRMService.java

@@ -479,6 +479,9 @@ public class ClientRMService extends AbstractService implements
   public GetContainerReportResponse getContainerReport(
       GetContainerReportRequest request) throws YarnException, IOException {
     ContainerId containerId = request.getContainerId();
+    if (containerId == null) {
+      throw new ContainerNotFoundException("Invalid container id: null");
+    }
     ApplicationAttemptId appAttemptId = containerId.getApplicationAttemptId();
     ApplicationId appId = appAttemptId.getApplicationId();