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()`


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