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https://issues.apache.org/jira/browse/FLINK-5791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15894463#comment-15894463
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ASF GitHub Bot commented on FLINK-5791:
---------------------------------------

Github user tillrohrmann commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3304#discussion_r104160736
  
    --- Diff: 
flink-runtime/src/main/java/org/apache/flink/runtime/clusterframework/types/ResourceProfile.java
 ---
    @@ -119,6 +122,9 @@ public boolean equals(Object obj) {
                }
                else if (obj != null && obj.getClass() == 
ResourceProfile.class) {
                        ResourceProfile that = (ResourceProfile) obj;
    +                   if (this == ResourceProfile.UNIVERSAL || that == 
ResourceProfile.UNIVERSAL) {
    +                           return true;
    +                   }
    --- End diff --
    
    Here you're basically breaking the Java contract that `if a.equals(b), then 
a.hashCode() == b.hashCode()`


> Resource should be strictly matched when allocating for yarn
> ------------------------------------------------------------
>
>                 Key: FLINK-5791
>                 URL: https://issues.apache.org/jira/browse/FLINK-5791
>             Project: Flink
>          Issue Type: Improvement
>          Components: YARN
>            Reporter: shuai.xu
>            Assignee: shuai.xu
>              Labels: flip-6
>
> In flip6, for yarn mode, resource should be assigned as requested to avoid 
> resource wasting and OOM.
> 1. YarnResourceManager will request container according to ResourceProfile   
> in slot request form JM.
> 2. RM will pass the ResourceProfile to TM for initializing its slots.
> 3. RM should match the slots offered by TM with SlotRequest from JM strictly.



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