Logback is unable to recognize variable substitution for scanPeriod property ---------------------------------------------------------------------------- Key: LBCLASSIC-307 URL: http://jira.qos.ch/browse/LBCLASSIC-307 Project: logback-classic Issue Type: Bug Components: Other Affects Versions: 0.9.30 Environment: Windows 7 Reporter: Oh Chin Boon Assignee: Logback dev list It seems like Logback is unable to recognize variable substitution for certain properties. For example the scanPeriod property: Logback configuration: <configuration scan="${scan:-true}" scanPeriod="${scan-interval:-10 minutes}"> Specified to take default value of 10 minutes of logback property is not defined. Logback properties: scan=true scan-interval=30 seconds This property should override the default configuration of 10 minutes. Logback error: java.lang.IllegalArgumentException: String value [${scan-interval:-10 minutes}] is not in the expected format. According to the Duration API, the duration format is correct. -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.qos.ch/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira