Hi Ravi,Regarding your response below:The question is:Why does header Content-Type=application/jsonchange to Content-Type=text/xml???We need for "Content-Type=application/json" to be propragated to the response.It seems to be somehow filtered, or otherwise changed to "Content-Type=text/xml"./Your second logging will log headers from the response sent by the http4 invocation. I am able to see the values and these are not blanked out./Thanks very much for any help/suggestions,chasse/[mel-1) thread #0 - timer://foo] COMBEFORE DEBUG Exchange[ExchangePattern: InOnly, Headers: {breadcrumbId=ID-LT005383-64443-1390555622180-0-1, CamelHttpCharacterEncoding=UTF-8, *Content-Type=application/json*, firedTime=Fri Jan 24 14:57:04 IST 2014}, BodyType: null, Body: [Body is null]][mel-1) thread #0 - timer://foo] COMAFTER DEBUG Exchange[ExchangePattern: InOnly, Headers: {Age=0, breadcrumbId=ID-LT005383-64443-1390555622180-0-1, Cache-Control=private, CamelHttpCharacterEncoding=UTF-8, CamelHttpResponseCode=200, Connection=keep-alive, *Content-Length=132, Content-Type=text/xml*; charset=utf-8, Date=Fri, 24 Jan 2014 09:27:05 GMT, firedTime=Fri Jan 24 14:57:04 IST 2014, P3P=policyref="http://info.yahoo.com/w3c/p3p.xml", CP="CAO DSP COR CUR ADM DEV TAI PSA PSD IVAi IVDi CONi TELo OTPi OUR DELi SAMi OTRi UNRi PUBi IND PHY ONL UNI PUR FIN COM NAV INT DEM CNT STA POL HEA PRE LOC GOV", Server=ATS, Vary=Accept-Encoding, Via=http/1.1 fts115.flickr.bf1.yahoo.com (ApacheTrafficServer/4.0.1 [cMsSf ]), http/1.1 r02.ycpi.inc.yahoo.net (ApacheTrafficServer/4.0.2 [cMsSf ]), X-Served-By=www222.flickr.bf1.yahoo.com}, BodyType: org.apache.camel.converter.stream.CachedOutputStream.WrappedInputStream, Body: [Body is instance of java.io.InputStream]]/
-- View this message in context: http://camel.465427.n5.nabble.com/Http4-Set-Header-Content-Type-not-passing-through-to-the-HTTP-Request-tp5746414p5746452.html Sent from the Camel - Users mailing list archive at Nabble.com.