Apache Camel 3.x Upgrade Guide This document is for helping you upgrade your Apache Camel application from Camel 3.x to 3.y. For example if you are upgrading Camel 3.0 to 3.2, then you should follow the guides from both 3.0 to 3.1 and 3.1 to 3.2. Upgrading Camel 3.21 to 3.22 No changes expected.