I am trying to use variable substitution for the scanPeriod property such that i

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Editorial Team

Asked: June 7, 20262026-06-07T16:10:06+00:00 2026-06-07T16:10:06+00:00

I am trying to use variable substitution for the scanPeriod property such that i can have multiple environment files.

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 is using:

EDIT: Filed a Jira report for this – http://jira.qos.ch/browse/LBCLASSIC-307

UPDATE:
28 Dec 2011 This is marked as a Major, and looked at by Ceki Gulcu. 😀

UPDATE:
12 Jun 2012 Still no updates. Left comment in JIRA.

UPDATE:
12 July 2012 Accepted as a valid bug. To fix in 1.0.7

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Editorial Team · Answer 1 · 2026-06-07T16:10:08+00:00

Editorial Team

Accepted as a valid bug and to be fixed in 1.0.7

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