grails / log4j / conversion pattern / %throwable -

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i use log4j 1.2.16 regarding "dependency-report".

my conversion pattern '%d{yyyy-mm-dd hh:mm:ss,sss} %-5p %c: %m%n %throwable{short}'

but %throwable not recognized, instead loglines contain

'...hrowable{short}...'

any idea ?

i assume in appender? using enhancedpatternlayout (i believe need %throwable{n})

console name: 'stdout', layout: new enhancedpatternlayout(conversionpattern: "%d{yyyy-mm-dd hh:mm:ss,sss} %-5p %c: %m%n %throwable{short}")

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