The workaround is adding Import-Package org.apache.xpath.jaxp to your customer bundle, this should work.
Thank you very much for your quick reply!
You saved my day.
It's working again.
sorry for my stupid question
but how do I do that ?
You can add Import-Package org.apache.xpath.jaxp to your customer bundle, which means configure the maven-bundle-plugin in your bundle's pom.xml to add this Import-Package, you can take a look at our examples shipped with kit to get more concrete idea how to do it.
Or use new release FUSE ESB 4.4.0-fuse-00-39, which already fix this issue.
works now with the import-Package in the pom.xml.
had to add org.apache.servicemix.bundles also in my dependencies.