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https://issues.apache.org/jira/browse/CAMEL-24996?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Claus Ibsen reassigned CAMEL-24996:
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Assignee: Claus Ibsen
> camel-core - Changing a header value through the entry set of a copied
> message changes the original message
> -----------------------------------------------------------------------------------------------------------
>
> Key: CAMEL-24996
> URL: https://issues.apache.org/jira/browse/CAMEL-24996
> Project: Camel
> Issue Type: Bug
> Components: camel-core
> Affects Versions: 4.21.0, 4.22.0
> Reporter: Claus Ibsen
> Assignee: Claus Ibsen
> Priority: Major
>
> Changing a header value through the entry set of a copied message changes the
> header of the original message, and of the other copies.
> Since CAMEL-23681 (Camel 4.21), a copied message shares its headers with the
> original through CopyOnWriteHeadersMap until one of them changes a header.
> The entry set of a shared map returned the entries of the shared map itself
> (from its iterator and from toArray). So entry.setValue(...) changed the
> shared map without copying it first.
> For example, in a split each sub-message starts out sharing the headers of
> the parent message. A sub-message that changes a header value through
> getHeaders().entrySet() changed it for the parent message and for the other
> sub-messages. After the split, the parent message had the value set by the
> last sub-message.
> The entries of a shared map are now wrapped, so setValue copies the map
> first, as the other write operations already do.
> Affects 4.21.0 and 4.22.0.
> _Claude Code on behalf of Claus Ibsen_
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