The 1.3.6 release is a new version of the org-pipeline-server module only. No dependent libraries have changed and there are no database structure or stored procedure changes.
The release is fully backward compatible. Although the 1.3.6 release involves new features added to the jython-scriptlet and variable-expression-parsing interfaces, all previous features remain available.
The upgrade requires only a simple restart of the pipeline server application.
If problems are discovered in the 1.3.6 release, the current release version (1.3.5) can be restored with a simple restart of the pipeline server application. However, any new tasks using the functionality available in 1.3.6 will fail to execute if a back-out of the new version is performed.