Adding System property in pattern-formatter in domain/standalone xmls of as7 does not print the value

Adding a system property in the pattern string of logging.properties ${<system property>} substitutes the value in log file. However the same in domain.xml/standalone.xml does not substitute the variable with the value.

(Addition notes: PropertyHelper.resolveValue() is used to get the value in normal case. However from AS7 this appears to get bypassed as in FormatterSpec.java : apply() calls the constructor of PatternFormatter directly which in turn resolves other variables and system property remains unresolved)