OAK-1312 introduced a new feature with Oak 1.6 that allowed the DocumentNodeStore to store multiple nodes in the same document.
The recovery command logs warn messages on on descendants of nodes that are bundled. The LastRevRecoveryAgent complains about missing document. E.g. consider a configuration that bundles the jcr:content child node into the parent nt:file node. If the jcr:content node has descendant nodes, the LastRevRecoveryAgent may log a warn message like this: