slfan1989 commented on code in PR #4846:
URL: https://github.com/apache/hadoop/pull/4846#discussion_r962108019
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/federation/store/impl/MemoryFederationStateStore.java:
##########
@@ -255,14 +261,33 @@ public GetApplicationHomeSubClusterResponse
getApplicationHomeSubCluster(
@Override
public GetApplicationsHomeSubClusterResponse getApplicationsHomeSubCluster(
GetApplicationsHomeSubClusterRequest request) throws YarnException {
- List<ApplicationHomeSubCluster> result =
- new ArrayList<ApplicationHomeSubCluster>();
- for (Entry<ApplicationId, SubClusterId> e : applications.entrySet()) {
- result
- .add(ApplicationHomeSubCluster.newInstance(e.getKey(),
e.getValue()));
+
+ if (request == null) {
+ throw new YarnException("Missing getApplicationsHomeSubCluster request");
+ }
+
+ List<ApplicationHomeSubCluster> result = new ArrayList<>();
+ List<ApplicationId> applicationIdList =
+ applications.keySet().stream().collect(Collectors.toList());
+
+ SubClusterId requestSubClusterId = request.getSubClusterId();
+ int appCount = 0;
+ for (int i = 0; i < applicationIdList.size(); i++) {
+ if (appCount >= maxAppsInStateStore) {
+ break;
+ }
+ ApplicationId applicationId = applicationIdList.get(i);
+ SubClusterId subClusterId = applications.get(applicationId);
+ // If the requestSubClusterId that needs to be filtered in the request
+ // is inconsistent with the SubClusterId in the data, continue to the
next round
+ if (requestSubClusterId != null &&
!requestSubClusterId.equals(subClusterId)){
+ continue;
+ }
+ result.add(ApplicationHomeSubCluster.newInstance(applicationId,
subClusterId));
+ appCount++;
}
- GetApplicationsHomeSubClusterResponse.newInstance(result);
Review Comment:
This line of code should be an extra line of code, which has no practical
significance. The following is directly constructed and returned.
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