The attached test (apply on camel trunk) shows an issue when you mix Jetty and http in the same route. If you run the test and then check the target/camel-itest-test.log you'll see the following exception occurs:

Exhausted after delivery attempt: 1 caught: java.lang.IllegalArgumentException: host parameter is null
java.lang.IllegalArgumentException: host parameter is null
at org.apache.commons.httpclient.HttpConnection.<init>(HttpConnection.java:206)
at org.apache.commons.httpclient.HttpConnection.<init>(HttpConnection.java:155)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionWithReference.<init>(MultiThreadedHttpConnectionManager.java:1145)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$ConnectionPool.createConnection(MultiThreadedHttpConnectionManager.java:762)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:476)
at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:416)
at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:153)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:323)
at org.apache.camel.component.http.HttpProducer.executeMethod(HttpProducer.java:164)
at org.apache.camel.component.http.HttpProducer.process(HttpProducer.java:78)
at org.apache.camel.processor.SendProcessor$1.doInProducer(SendProcessor.java:97)
at org.apache.camel.processor.SendProcessor$1.doInProducer(SendProcessor.java:95)
at org.apache.camel.impl.ProducerCache.doInProducer(ProducerCache.java:173)

It's possible to work around this by specifically setting the HTTP_URI/HTTP_QUERY headers. Also I checked the camel-http HttpGetTest and that works fine.