The patch.jar for the ConfigManager and Master Controller has to be uploaded via the Admin Interface.  The patch for the OC / FSS can be placed under the name patch.jar in the region home folder of the oc / fss and specifically listed in the client config xml under <otherRootConfigFiles>. When the ConfigManager is used to upload a new patch.jar, the patch.jar in the OC and FSS will replace the file in their region home by the new file from the database. When it is necessary to control the fss and oc patches separately, a prefix fss_ or oc_ or any other prefix can be used (e.g. fss_patch.jar) or oc_patch.jar) as long as the last part is patch.jar. The prefix is optional.  It used to be common to distribute the patch.jar using the ConfigManager as a RootConfigFile, but for convenience, in 2021.02 and later, the patch.jar uploaded via the Admin Interface can also be used for the Operator Clients and Forecasting Shell Servers.

Since 2021.02, the OC / FSS and can also automatically use the patch.jar uploaded via the Admin Interface. This will happen automatically when the patch.jar is no longer present in the client config xml file and a recent boot build is used (at least 2021.02 #106157).