We have removed resteasy-jettison-provider from master branch, and here is the tracker bug on this change:

https://issues.jboss.org/browse/RESTEASY-1316

The major affect is that the resteasy-link module is now dependent on resteasy-jackson2-provider to replace resteasy-jettison-provider to support JAXB annotation -> JSON data marshaling.

In addition, Jackson2 has some subtle differences on supporting JAXB annotations comparing with the default JAXB or Jettison marshallers. So some resteasy-link test classes are adjusted to accommodate this change. Here is the relative PR that shows the difference after the migration:

https://github.com/resteasy/Resteasy/pull/1850/files#diff-a873f7dcbc6d4b04d29b4f0dd1015f76R17

The above change shows the changes in JAXB annotations after changing the JAXB -> JSON provider to resteasy-jackson2-provider for resteasy-link module.

Above is the summary of Jettison removal.