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https://issues.apache.org/jira/browse/CONFIGURATION-407?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12831679#action_12831679
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Sebb commented on CONFIGURATION-407:
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I think the user guide needs to be a lot clearer about what manual synch. is
required. What should the reader threads synchronize on?
Thread-safety and correct publication is only guaranteed if the writer and
reader threads use the *same* lock, so the reader thread needs to know what
lock to use.
> HierarchicalINIConfiguration can throw an exception if the global section is
> accessed concurrently
> --------------------------------------------------------------------------------------------------
>
> Key: CONFIGURATION-407
> URL: https://issues.apache.org/jira/browse/CONFIGURATION-407
> Project: Commons Configuration
> Issue Type: Bug
> Affects Versions: 1.6
> Reporter: Oliver Heger
> Assignee: Oliver Heger
> Fix For: 1.7
>
>
> If the global section of a hierarchical INI configuration is requested, a new
> ViewNode is created which becomes the root node of a new configuration for
> the global section. Nodes representing properties of the global section are
> added to this ViewNode. This operation temporarily changes the parent node of
> these nodes which may cause problems if the method is called by multiple
> threads concurrently. Because access to a section is a read-only operation,
> this should be thread-safe.
> The probability that this error happens is pretty low IMO. Therefore it
> should be hard to create a unit test.
> The issue can be fixed by synchronizing the add operation to the ViewNode.
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