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Configuration History
The application server maintains past versions of its configuration files. This behavior allows the operator to fall back to a certain previous configuration.
Each CLI operation increments the configuration version, and a full copy of the previous configuration is stored in $JBOSS_HOME/standalone/configuration/standalone_xml_history/current Upon reboot, the current directory is renamed to something similar to $JBOSS_HOME/standalone/configuration/standalone_xml_history/20160331-201819598 and the cycle repeats. Also see Taking and Restoring Configuration Snapshots.