Hexiaoqiao commented on PR #8377:
URL: https://github.com/apache/hadoop/pull/8377#issuecomment-4257962986

   @pan3793 @JHSUYU FYI. When we said `systemCredentialsForApps`, it means 
org.apache.hadoop.yarn.server.nodemanager.NodeManager.NMContext#systemCredentials,
 right? If that it includes system credentials of all applications. The 
workflow as following, 
   
   ResourceManager side:
   
https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-resourcemanager/src/main/java/org/apache/hadoop/yarn/server/resourcemanager/ResourceTrackerService.java#L1043-L1063
   
   NodeManager side:
   
https://github.com/apache/hadoop/blob/trunk/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/NodeStatusUpdaterImpl.java#L1383-L1389


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