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

    https://github.com/apache/flink/pull/4346#discussion_r132402963
  
    --- Diff: 
flink-libraries/flink-gelly-examples/src/main/java/org/apache/flink/graph/drivers/parameter/LongParameter.java
 ---
    @@ -52,16 +52,6 @@ public LongParameter(ParameterizedBase owner, String 
name) {
        public LongParameter setDefaultValue(long defaultValue) {
                super.setDefaultValue(defaultValue);
     
    -           if (hasMinimumValue) {
    -                   Util.checkParameter(defaultValue >= minimumValue,
    -                           "Default value (" + defaultValue + ") must be 
greater than or equal to minimum (" + minimumValue + ")");
    -           }
    -
    -           if (hasMaximumValue) {
    -                   Util.checkParameter(defaultValue <= maximumValue,
    -                           "Default value (" + defaultValue + ") must be 
less than or equal to maximum (" + maximumValue + ")");
    -           }
    -
    --- End diff --
    
    I'm no expert here, but can you elaborate on why you removed these checks 
for the default value being in line with the min and max?
    
    I can only guess that this must be that way in case where the default 
parallelism is not within the bounds of the configured one. I'm wondering 
whether the `LongParameter` is used somewhere else were these bounds are 
expected to hold though.


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