[LOG4J2-2944] Add support for copying one appender to another.

• Type: New Feature
• Status: Closed
• Priority: Critical
• Resolution: Not A Problem
• Affects Version/s: 2.14.0, 2.13.3
• Component/s: Appenders
• External issue URL: https://stackoverflow.com/questions/28624688/log4j-create-another-appender-with-same-properties
• Assignee: Unassigned
• Reporter: Srinivas
• Created: 13/Oct/20 04:50
• Updated: 17/May/22 05:59
• Resolved: 17/May/22 05:59

Description

• Currently the copying of one appender to another in the log4j.properties file is not supported.
• One can copy the properties by referencing them like so 
   ${log4j.appender.INFOLOGGER}
• However each property will have to be referenced like so and copied to the corresponding one in the new appender.
• We need to have a operation like so: log4j.appender.newone = ^log4j.appender.oldone which copies all existing properties of the old appender. 
• https://stackoverflow.com/questions/28624688/log4j-create-another-appender-with-same-properties
• https://stackoverflow.com/questions/22250968/how-best-to-copy-a-configured-log4j-appender
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