IIRC sendFault() shouldn't be used on InOnly, so this is doing wrong https://github.com/jboss-fuse/switchyard/blob/2.x.redhat-6-2-x-patch/components/camel/camel-switchyard/src/main/java/org/switchyard/component/camel/switchyard/SwitchYardConsumer.java#L99-L122
Not sure what would happen, the fault may be just ignored. We need to test the InOnly error path carefully there.
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