[ 
http://issues.apache.org/jira/browse/CONFIGURATION-228?page=comments#action_12436935
 ] 
            
Oliver Heger commented on CONFIGURATION-228:
--------------------------------------------

I think the problem here is that the subset configuration returned by 
XMLConfiguration is not life, i.e. it is not really connected to the parent 
configuration. There was a bug report (CONFIGURATION-212) describing this 
problem.

In the current code base there is the new method configurationAt(String key) in 
HierarichicalConfiguration that returns a life configuration. You can try this 
method as an alternative.

But maybe the subset() implementation should be changed to return a life 
subset, too.

> XMLConfiguration.subset() with FileChangedReloadingStrategy does *not* 'see' 
> file changes
> -----------------------------------------------------------------------------------------
>
>                 Key: CONFIGURATION-228
>                 URL: http://issues.apache.org/jira/browse/CONFIGURATION-228
>             Project: Commons Configuration
>          Issue Type: Bug
>    Affects Versions: 1.2 Final
>            Reporter: Janusz Studzizba
>
> XMLConfiguration.subset() with FileChangedReloadingStrategy does *not* 'see' 
> file changes
> Configuration.xml:
> <conf>
>     <parent-item>
>         <sub-item>old_value</sub-item>
>     </parent-item>
> </conf>
> 1. XMLConfiguration is loaded:
>             config = new XMLConfiguration("c:\\conf.xml");
>             config.setReloadingStrategy(new FileChangedReloadingStrategy());
> 2. Now, <sub-item> node value changes to "new_value",
> and the code:
>             Configuration parentItemConfig = config.subset("parent-item"); 
> [AA]
>             String ss2 = parentItemConfig.getString("sub-item");
> returns "old_value" !!!
> while:  config.getString("parent-item.sub-item"); returns new refreshed value.
> It is a bug, we have FileChangedReloadingStrategy, we create new subset in 
> [AA] but receive old values.
> [for now, workaround for config users is to call config.reload() when 
> strategy.hasChanged()]

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