Hi Claus, Ok - I think I've tracked this problem down (after a lot of frustration and wasted time!). You should be easily able to reproduce the problem with the code I posted originally if you simply use HttpComponent version 4.2 (i.e. 'httpclient-4.2.jar' and 'httpcore-4.2.jar'). The latest version is 4.2.1, and that version works fine for me.
With the 4.2 versions I traced the NPE down to a call to 'new StringEntity()' (on line 424 of org.apache.camel.component.http4.HttpProducer), which seems to be a known problem: http://www.mail-archive.com/httpclient-users@hc.apache.org/msg05668.html http://www.mail-archive.com/httpclient-users@hc.apache.org/msg05668.html . Although this post ( http://dvdsdirect.us/notesstringentity.jsp http://dvdsdirect.us/notesstringentity.jsp ) suggests the problem is also present in version 4.2.1, my use-case seems to be working fine with that version. As part of my investigations I confirmed that the HttpClient version 3 libraries (and therefore using the 'camel-http' component (as opposed to 'camel-http4' component)) worked fine too, but I'm trying to keep my project on the latest versions of everything, so I think I should be fine with HttpComponent 4.2.1. Thanks for looking into this particular issue - but I should be fine to continue now. I don't think Camel needs to do anything, except maybe, somehow, notify people of this potential problem with HttpComponent 4.2. -- View this message in context: http://camel.465427.n5.nabble.com/Http4-component-throws-useless-NPE-if-request-body-is-String-instead-of-InputStream-tp5717268p5717449.html Sent from the Camel - Users mailing list archive at Nabble.com.
