Routing from camel-jetty proxy to camel-fabric throws java.lang.IllegalArgumentException: !Absolute URI: /myserviceuri

Issue

A camel route is defined as follows:

<route id="Jetty-proxy-to-Fabric-Service">
        <from uri="jetty:http://localhost:{{portNumber}}/myserviceuri?matchOnUriPrefix=true"/>
        <log message="Request received headers: ${headers}"/>
        <to uri="fabric:backendcluster" />
</route>

where the backend cluster is a cluster of CXF JAX-RS endpoints.

The route throws java.lang.IllegalArgumentException: !Absolute URI: /myserviceuri with the following stack trace:

at org.eclipse.jetty.client.HttpExchange.setURI(HttpExchange.java:608)[83:org.eclipse.jetty.client:7.6.7.v20120910]
    at org.eclipse.jetty.client.HttpExchange.setURL(HttpExchange.java:431)[83:org.eclipse.jetty.client:7.6.7.v20120910]
    at org.apache.camel.component.jetty.JettyHttpProducer.createHttpExchange(JettyHttpProducer.java:116)[239:org.apache.camel.camel-jetty:2.10.0.fuse-71-047]
    at org.apache.camel.component.jetty.JettyHttpProducer.process(JettyHttpProducer.java:93)[239:org.apache.camel.camel-jetty:2.10.0.fuse-71-047]
    at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:99)[147:org.apache.camel.camel-core:2.10.0.fuse-71-047]
    at org.apache.camel.component.jetty.JettyHttpProducer.process(JettyHttpProducer.java:88)[239:org.apache.camel.camel-jetty:2.10.0.fuse-71-047]
    at org.fusesource.fabric.camel.FabricLocatorEndpoint$3.process(FabricLocatorEndpoint.java:111)[282:org.fusesource.fabric.fabric-camel:7.1.0.fuse-047]
    at org.apache.camel.util.AsyncProcessorConverterHelper$ProcessorToAsyncProcessorBridge.process(AsyncProcessorConverterHelper.java:61)[147:org.apache.camel.camel-core:2.10.0.fuse-71-047]
    at org.apache.camel.util.AsyncProcessorHelper.process(AsyncProcessorHelper.java:73)[147:org.apache.camel.camel-core:2.10.0.fuse-71-047]
    at org.apache.camel.processor.loadbalancer.QueueLoadBalancer.process(QueueLoadBalancer.java:44)[147:org.apache.camel.camel-core:2.10.0.fuse-71-047]