Apache Camel: CXF - returning Holder values (error: IndexOutOfBoundsException: Index: 1, Size: 1)

Question

I have a problem with setting holders in my output message. I have following simple routing and processor:

from("cxf:bean:ewidencjaEndpoint")
    .process(new ProcessResult())
    .end();

public class ProcessResult implements Processor {

    public void process(Exchange exchange) throws Exception {

        Object[] args =  exchange.getIn().getBody(Object[].class);

        long id = (long) args[0];
        Holder<A> dataA = (Holder<A>) args[1];
        Holder<B> dataB = (Holder<B>) args[2];

        exchange.getOut().setBody(new Object[]{ dataA, dataB});

}

I get the following error:

java.lang.IndexOutOfBoundsException: Index: 1, Size: 1
at java.util.ArrayList.RangeCheck(ArrayList.java:547)
at java.util.ArrayList.get(ArrayList.java:322)
at org.apache.cxf.jaxws.interceptors.HolderInInterceptor.handleMessage(HolderInInterceptor.java:67)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:255)
at org.apache.cxf.endpoint.ClientImpl.onMessage(ClientImpl.java:737)
at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream.handleResponseInternal(HTTPConduit.java:2335)
at org.apache.cxf.transport.http.HTTPConduit$WrappedOutputStream$1.run(HTTPConduit.java:2198)

I've read many similar problems descriped on web (ie.: http://camel.465427.n5.nabble.com/java-lang-IndexOutOfBoundsException-in-cxf-producer-td468541.html) but without any success in resolving the problem.

In debug I get output message like:

Exchange[Message[null,null, A@xxxm B@yyy]]

I don't understand what the foolowing "null" values come from. I've got only 2 outputs values (in Holders) according to wsdl file (and generated interface). I see also in debug console that in 'out' part of exchange body I have only 2 values set in ProcessResult()(idexed from 2 to 3), and size value of the 'out' part is set to '4' (not 2) ?

Possible duplicate of [What causes a java.lang.ArrayIndexOutOfBoundsException and how do I prevent it?](http://stackoverflow.com/questions/5554734/what-causes-a-java-lang-arrayindexoutofboundsexception-and-how-do-i-prevent-it) — Teepeemm, Jan 10 '16 at 20:32
The error is the same but the reason why it's appeared is different. In my case it problem with defining outputs in Camel Integration Framework. It was described in some forums but I have not found the soultion already. — TomekB, Jan 11 '16 at 07:18
Problem solved: I didn't send holders in request messagem deleting following lines fixed the problem: ( Holder dataA = (Holder ) args[1]; Holder dataB = (Holder) args[2];). I'm creating new output holders and set new values for them, — TomekB, Jan 11 '16 at 10:32
The cause of such an exception is always different. But the point of that Q&A is that you should almost never post to SO "I have an AIOBException". You should post "why does `args` not have the things that it should have". — Teepeemm, Jan 11 '16 at 14:57

Apache Camel: CXF - returning Holder values (error: IndexOutOfBoundsException: Index: 1, Size: 1)

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