Claus Ibsen created CAMEL-25751:
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Summary: camel-platform-http-vertx, camel-file - a Map or List
body says to marshal it first when it is the HTTP reply or written to a file
Key: CAMEL-25751
URL: https://issues.apache.org/jira/browse/CAMEL-25751
Project: Camel
Issue Type: Improvement
Components: camel-platform-http-vertx, camel-file
Reporter: Claus Ibsen
Fix For: 4.24.0
A body that is a Map or a List (unmarshalled from JSON, or built as a map)
fails when it is the reply of a platform-http route, and when the file producer
writes it, and the message names only the conversion:
{noformat}
NoTypeConversionAvailableException: No type converter available to convert from
type: java.util.LinkedHashMap to the required type: java.io.InputStream
{noformat}
CAMEL-25309 gave the http producer a sentence for the same case ("a Map is not
an HTTP request body: marshal it to JSON first (marshal: json) or set the body
to the JSON text"). The reply and the file write should say the same:
* camel-platform-http-vertx:
{{VertxPlatformHttpSupport.writeResponseAsFallback}} - a Map is not an HTTP
response body: marshal it to JSON first (marshal: json) as the last step of the
route, or let the REST binding write it (bindingMode: json).
* camel-file: {{FileOperations.storeFile}} - a Map is not file content: marshal
it first (marshal: json), or set the body to the text.
Found in the r17 series of the local-model benchmark (2026-10-17/18): 5 of the
17 runs that hit a body type collision failed at these two places (3
platform-http replies, 2 file writes), and all 5 failed the step. The validator
reports the static cases (CAMEL-24844, PR 28047); this is the runtime side,
which CAMEL-25749 later moves onto the shared helper.
_Filed by Claude Code on behalf of davsclaus_
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