Several component directories are renamed as follows during the product upgrade:
<product root>\component is renamed to <product root>\component-old
These “old” directories remain after upgrade is complete, for reference. If any modifications or additions are made to these directory trees before the upgrade, they are included in that “old” directory. Those alterations are not automatically merged with the new running product that takes over <product root>\component. If such alterations are desired to be in effect for the new product, reapply the customized settings manually.
The following list provides the components that have this limitation and their directory names:
Note: While this limitation is true for Tomcat itself, some configuration data under Tomcat is in fact carried forward automatically during the upgrade.
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