Compatibility Issue: Pure Java Camel Integration Example Fails with Wanaku Router 0.0.9 (No Content to Map Error)

[hassan-ghanem]

Is the pure Java Apache Camel example from the camel integration capability demos (specifically the cat-facts-example under 06-camel-integration-capability-existing-route) compatible with Wanaku Router version 0.0.9?

When attempting to run it against router version 0.0.9, it fails during service registration with the following error:

Unable to register service because of: No content to map due to end-of-input
com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input

[2m2026-02-24 11:08:21,257←[m [←[33mWARN ←[m] Unable to register service because of: No content to map due to end-of-input
 at [Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); line: 1]
com.fasterxml.jackson.databind.exc.MismatchedInputException: No content to map due to end-of-input
 at [Source: REDACTED (StreamReadFeature.INCLUDE_SOURCE_IN_LOCATION disabled); line: 1]
        at com.fasterxml.jackson.databind.exc.MismatchedInputException.from(MismatchedInputException.java:72)
        at com.fasterxml.jackson.databind.ObjectMapper._initForReading(ObjectMapper.java:5129)
        at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:5028)

Does this example work with version 0.0.9, or is it incompatible with that router release?

Note:
Official camel integration capability v0.0.9 works properly.
https://github.com/wanaku-ai/camel-integration-capability/releases/tag/v0.0.9

[orpiske]

It definitely should be. I think I may have made a mistake on the documentation. One of the reasons why this happens is when the registration address with the backend is incorrect.

[hassan-ghanem]

The registration url and all other parameters are as exactly same as the ones used with the official camel integration capability. However, the example throws this error wheares the offical camel integration capability works properly.

[hassan-ghanem]

@orpiske
If I’m not mistaken, does the plugin option work only with the early-access version? Could you please confirm?

https://github.com/wanaku-ai/wanaku/releases/tag/early-access

[orpiske]

That's correct for the plugin. It is part of the ongoing development work, so it will not work on deployments older than 0.1.0-SNAPSHOT. Also, as it still a WIP, it's largely undocumented, so it may need some code reading to figure it out - if needed.

[orpiske]

BTW, I plan to release a new early access build this week - before I leave on PTO - bringing several fixes for the router, performance improvements, etc.

I can't promise it will be fully functional, but I believe it may work better than the current dev preview.