[logback-dev] [JIRA] (LOGBACK-1000) MDC default value is not parsed

[Tim Evers (JIRA)]

Tim Evers created LOGBACK-1000 MDC default value is not parsed Issue Type: Improvement Affects Versions: 1.1.2 Assignee: Logback dev list Components: logback-classic Created: 01/Aug/14 3:58 AM Description: If you want the default value of a MDC lookup to be the result of a different MDC lookup (or any other variable/substitution) it does not work. %X{mdcKey:-%X{defaultKey}} should be allowed. Instead if %X{mdcKey} is not defined the log output is the literal string "%X{defaultKey}" instead of performing an MDC lookup on the defaultKey. For example, we are trying to use the following pattern. <encoder> <pattern>%d{ISO8601} %-5level [%thread] [%X{signature}:%c{0}] %msg%n</pattern> </encoder> However, %c{0} is never parsed or turned into the name of the logger. Best I can tell from looking at the code the default value of a MDC token is never parsed. Project: logback Priority: Major Reporter: Tim Evers

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