slfan1989 commented on code in PR #4892:
URL: https://github.com/apache/hadoop/pull/4892#discussion_r985217861
##########
hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-router/src/main/java/org/apache/hadoop/yarn/server/router/webapp/FederationInterceptorREST.java:
##########
@@ -1456,28 +1460,178 @@ public Response
cancelDelegationToken(HttpServletRequest hsr)
@Override
public Response createNewReservation(HttpServletRequest hsr)
throws AuthorizationException, IOException, InterruptedException {
- throw new NotImplementedException("Code is not implemented");
+ long startTime = clock.getTime();
+
+ Map<SubClusterId, SubClusterInfo> subClustersActive;
+ try {
+ subClustersActive = federationFacade.getSubClusters(true);
+ } catch (YarnException e) {
+ routerMetrics.incrGetNewReservationFailedRetrieved();
+ return Response.status(Status.INTERNAL_SERVER_ERROR).
+ entity(e.getLocalizedMessage()).build();
+ }
+
+ List<SubClusterId> blacklist = new ArrayList<>();
+
+ for (int i = 0; i < numSubmitRetries; ++i) {
+ SubClusterId subClusterId = null;
+ try {
+ subClusterId = getRandomActiveSubCluster(subClustersActive, blacklist);
+ SubClusterInfo subClusterInfo = subClustersActive.get(subClusterId);
+ DefaultRequestInterceptorREST interceptor =
getOrCreateInterceptorForSubCluster(
+ subClusterId, subClusterInfo.getRMWebServiceAddress());
+ Response response = interceptor.createNewReservation(hsr);
+ LOG.info("createNewReservation try #{} on SubCluster {}.", i,
subClusterId);
+ if (response != null && response.getStatus() ==
HttpServletResponse.SC_OK) {
+ long stopTime = clock.getTime();
+ routerMetrics.succeededGetNewReservationRetrieved(stopTime -
startTime);
+ return response;
+ } else {
+ // Empty response from the ResourceManager.
+ // Blacklist this subCluster for this request.
+ blacklist.add(subClusterId);
+ }
+ } catch (YarnException e) {
+ routerMetrics.incrGetNewReservationFailedRetrieved();
+ subClustersActive.remove(subClusterId);
Review Comment:
In this part of the code `getRandomActiveSubCluster`, After removeAll
blackList from activeSubclusters, we should check whether there are any
available SubClusterIds, because all SubClusterIds may be added to the
blacklist.
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