How to restore a cluster environment to an existing pre-production one?

Answer

The main procedure is described in our documentation at https://academy.jahia.com/documentation/digital-experience-manager/7.1/technical/configuration-and-fine-tuning/faq

However and as the pre-production environment already exists, some precautions have to be followed:

1. The digital-factory-config folder has not to be copied as the pre-production contains a file jahia.node.properties and possibly other personalized properties files.
2. If binaries are stored in the file system in the production environment, the following chapter must be checked:
   Restore the binaries stored on the filesystem
3. If you got this warning when starting nodes:

   2016-10-11 09:42:39,295: WARN [TCP] - JGRP000032: null: no physical address for e3b8cb20-10d5-a453-c823-e63a55a1bc48, dro
   The table JGROUPSPING must be deleted: DELETE FROM JGROUPSPING

4. The tomcat/temp and the tomcat/work folders must be flushed in the pre-production environment.