Camel threads in route with a rejectedPolicy equals Abort, when task rejected or aborted causes exception this exception is not caught by camel-route.

Issue

• Within a Camel route (written in blueprint) a thread element is used to control the number of simultaneous executions of a block of actions.
• Property rejectedPolicy="Abort" is set, as requirement is to capture when a task is rejected and respond to the consumer in an appropriate manner.
• However when Abort reject policy exception is thrown, following is the exception trace

org.apache.camel.CamelExecutionException, 
caused by Caused by: java.util.concurrent.RejectedExecutionException,

• Above exception is not caught by camel-route. It is propogated back to the consumer.
• Consequently cannot respond to the consumer in an appropriate manner.