About the saving of properties which values have the default ones

[Philippe Mouawad]

Hello,

In JMeter we usually manage properties this way:
    public String getImplementation() {
        return getPropertyAsString(IMPLEMENTATION, DEFAULT_POLICY);
    }

    public void setImplementation(String implementation){
        setProperty(IMPLEMENTATION, implementation, DEFAULT_POLICY);
    }


setProperty will not save in JMX the value if it is equal to DEFAULT_POLICY.
This is good for the size of JMX but it's an issue for migration when we
change default values in N+1 and load the JMX plan in this new plan.

You can see an illustration through :
https://bz.apache.org/bugzilla/show_bug.cgi?id=58756#c2
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The issue is that when reading a 2.13 saved JMX from a 3.0, as default have
changed, the default values are not in JMX file so we end up initializing
different values.

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So I think we should abandon this practice in favor of explicit defaults.

Second question, how can we fix this issue ?
upgrade.properties used by NameUpdater does some upgrade but not on default
values.


Thanks
Regards
Philippe M.
@philmdot