Camel type conversion fails in Fuse

Question

I have a camel route with a cxf producer (Camel v2.10):

<to uri="cxf:bean:myCxfEndpoint?dataFormat=PAYLOAD"/>

I know that camel does a conversion to CxfPayload, so I added the following imports to OSGi header:

org.apache.camel.component.cxf,
org.apache.camel.component.cxf.converter,
org.apache.camel.converter.jaxb

So when the producer is triggered the following exception occurs:

org.apache.camel.NoTypeConversionAvailableException - No type converter available to convert from type: my.package.Foo to the required type: org.apache.camel.component.cxf.CxfPayload

I can get rid of this exception by restarting the camel-jaxb bundle, but getting rid of it is not enough: I need to prevent it, because it happens every time I restart Fuse.

Any idea is highly appreciated :)

EDIT

It turned out that the issue doesn't always come up. Sometimes it works after restart, sometimes it doesn't. I tried to play with bundle-levels but it remained unpredictable. I have a feeling that it might be Camel who doesn't load the converters correctly, but based on the trace log it looks like the CxfPayloadConverter is always loaded into the ConverterRegistry.

Answer 1

After 10 hours of tracing and debugging I figured out the solution: I added a manual marshalling before the CXF Producer, like this:

    <marshal ref="myDataFormat"/>
    <to uri="cxf:bean:myCxfEndpoint?dataFormat=PAYLOAD"/>

Why: My assumption was that it's OK to send any POJO to the Camel CXF Endpoint and it'll be able to handle the Conversion. The only thing I can think of is it matters that in what order Camel loads the Converters. Every second time when it worked in fuse it could make a POJO -> String -> CxfPayload conversion so it could transitively resolve the conversion. I decided not to rely on this transitive conversion logic and checked all the loaded converters. I found that there are certain direct converters registered in the registry between XML Node/Element -> CxfPayload classes. So I decided to trick Camel's logic with marshalling my POJO.