matteominin opened a new pull request, #24467: URL: https://github.com/apache/camel/pull/24467
# Description Fixes [CAMEL-23883](https://issues.apache.org/jira/browse/CAMEL-23883). With `useIterator=true`, the Kafka producer splits an `Iterable` body into one record per element. A Jackson `JsonNode` implements `Iterable`, so a scalar value node (e.g. the `IntNode` from `transform().jq(".my-value")`) was seen as an empty iterable: the loop ran zero times, `send()` was never called, and the message was silently dropped with no exception or log. This narrows `isIterable()` so a `JsonNode` counts as a batch only when it is a container node (`isContainerNode()`). Scalar nodes now take the single-message path, so they are either delivered or fail with a clear serialization error, never silently dropped. Container nodes (`ArrayNode`/`ObjectNode`) are still split, unchanged. ## Open question / possible follow-up This fixes the reported Jackson case, but the same silent drop could recur for any body that is `Iterable` yet yields an empty iterator. An exception isn't safe (an empty `Collection` is a legitimate no-op). Would be worth adding a DEBUG log when the iterable path produces zero records? I'm happy to add it here or in a follow-up PR. # Target - [x] I checked that the commit is targeting the correct branch (Camel 4 uses the `main` branch) # Tracking - [x] If this is a large change, bug fix, or code improvement, I checked there is a [JIRA issue](https://issues.apache.org/jira/browse/CAMEL) filed for the change (usually before you start working on it). # Apache Camel coding standards and style - [x] I checked that each commit in the pull request has a meaningful subject line and body. - [x] I have run `mvn clean install -DskipTests` locally from root folder and I have committed all auto-generated changes. # AI-assisted contributions - [x] If this PR includes AI-generated code, commits have proper co-authorship attribution (e.g., `Co-authored-by` trailers) and the PR description identifies the AI tool used. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
