Stupid me finally figured it out. However there is a minor error in the documentation.
Example 9.5. Blueprint File for Exporting a Service in "Deploying into the OSGi Container" Book chap. 8 http://fusesource.com/docs/esb/4.2/deploy_osgi/DeploySimple-Publish.html does not include an id attribute on the service element. Without this I get an exception as described above.
Example 9.5. should read:
BTW this article help me to locate the problem: http://www.ibm.com/developerworks/opensource/library/os-osgiblueprint/index.html
osgi-service.zip 14.3 KB