Various versions of logback.groovy

logback1.groovy

/**
 * This one logs errors in Bootstrap.groovy into the stacktrace.log
 * Note the absence of a StackTrace logger.
 * /

import grails.util.BuildSettings
import grails.util.Environment

// See http://logback.qos.ch/manual/groovy.html for details on configuration
appender('STDOUT', ConsoleAppender) {
    encoder(PatternLayoutEncoder) {
        pattern = "%level %logger - %msg%n"
    }
}

root(ERROR, ['STDOUT'])

appender("FULL_STACKTRACE", FileAppender) {
    file = "build/stacktrace.log"
    append = true
    encoder(PatternLayoutEncoder) {
        pattern = "%level %logger - %msg%n"
    }
}
logger("grails.app.init.BootStrap", ERROR, ['FULL_STACKTRACE'], false)

logback2.groovy

/**
 * This one doesn't log into the stacktrace.log
 * This is expected behavior.
 * /

import grails.util.BuildSettings
import grails.util.Environment

// See http://logback.qos.ch/manual/groovy.html for details on configuration
appender('STDOUT', ConsoleAppender) {
    encoder(PatternLayoutEncoder) {
        pattern = "%level %logger - %msg%n"
    }
}

root(ERROR, ['STDOUT'])

appender("FULL_STACKTRACE", FileAppender) {
    file = "build/stacktrace.log"
    append = true
    encoder(PatternLayoutEncoder) {
        pattern = "%level %logger - %msg%n"
    }
}
logger("StackTrace", ERROR, ['FULL_STACKTRACE'], false)

logback3.groovy

/**
 * This one logs into the stacktrace.log for any error.
 * Note the absence of the StackTrace logger.
 * /

import grails.util.BuildSettings
import grails.util.Environment

// See http://logback.qos.ch/manual/groovy.html for details on configuration
appender('STDOUT', ConsoleAppender) {
    encoder(PatternLayoutEncoder) {
        pattern = "%level %logger - %msg%n"
    }
}


appender("FULL_STACKTRACE", FileAppender) {
    file = "build/stacktrace.log"
    append = true
    encoder(PatternLayoutEncoder) {
        pattern = "%level %logger - %msg%n"
    }
}
root(ERROR, ['STDOUT', 'FULL_STACKTRACE'])

gist for this question: http://stackoverflow.com/questions/36723285/why-does-stacktrace-log-not-fill-with-logback-in-grails-3