gnodet commented on PR #26942:
URL: https://github.com/apache/camel/pull/26942#issuecomment-5953171101
> @gnodet friendly ping, in case this got lost: did you have a chance to
look at it?
>
> To make the decision easy, either way is fine with us:
> - **Keep the fix.** Up to 4.20 `headers.keySet().remove("x-trace")` also
removed `X-Trace`; since 4.21 it silently removes nothing (the map overrides
`entrySet()` but not `keySet()`). The PR restores that with the existing
`findIndex`/`removeByIndex` path, and the 4.23 upgrade guide covers the one
visible change (`retainAll`).
> - **Don't support it**, as @davsclaus suggested: then I'd close this PR
and CAMEL-25059 as Won't Fix. If useful, I can instead open a small PR that
adds a sentence to the `Message.getHeaders()` Javadoc saying headers should be
modified through the Camel API (`setHeader`, `removeHeader`, `removeHeaders`),
not through the map's key set view.
>
> Just let me know which you prefer.
>
> _Claude Code on behalf of allthingssecurity_
The removal of the header in a case-insensitive way makes sense to me.
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