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https://issues.apache.org/jira/browse/CONFIGURATION-792?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17173091#comment-17173091
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Gary D. Gregory commented on CONFIGURATION-792:
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The 1.x line is unlikely to see a new release, I am focused on 2.x.
> commons-configuration 1.10 breaks code that worked with 1.9
> -----------------------------------------------------------
>
> Key: CONFIGURATION-792
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-792
> Project: Commons Configuration
> Issue Type: Bug
> Affects Versions: 1.10
> Reporter: Norbert Kiesel
> Priority: Major
>
> CONFIGURATION-556 changed how ConfigurationConverter.getConfiguration works:
> in 1.9, the Properties content was read into a newly created HashMap but in
> 1.10 this was changed to use the Properties as backing. While this allows to
> have changes to the Properties immediately reflected in the configuration, it
> breaks code that adds new entries to such a configuration.
> Example:
> {code:java}
> Properties properties = new Properties();
> properties.load(Files.newInputStream(Paths.get("sample.properties")));
> Configuration conf = ConfigurationConverter.getConfiguration(properties);
> conf.setProperty("version", "1.10");
> {code}
> will work in 1.9 but result in a NPE in 1.10.
> I understand that there are conflicting goals (compatibility with 1.7 or 1.9)
> but I think this should minimally be listed as a potential problem for
> upgrades to 1.10
>
>
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