slfan1989 commented on code in PR #6016:
URL: https://github.com/apache/hadoop/pull/6016#discussion_r1324353843
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hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-common/src/main/java/org/apache/hadoop/yarn/server/federation/store/impl/ZookeeperFederationStateStore.java:
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@@ -234,6 +273,23 @@ public void init(Configuration conf) throws YarnException {
reservationsZNode = getNodePath(baseZNode, ROOT_ZNODE_NAME_RESERVATION);
versionNode = getNodePath(baseZNode, ROOT_ZNODE_NAME_VERSION);
+ String hierarchiesPath = getNodePath(appsZNode,
ROUTER_APP_ROOT_HIERARCHIES);
+ routerAppRootHierarchies = new HashMap<>(5);
Review Comment:
Thank you very much for your help in reviewing the code! We define the
capacity as 5 because we currently support 0-4 Hierarchies in total. I will
improve this part of the code.
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