Where to find 'application.log'?

I've enabled production mode logging in Play! and I'm using this configuration from here http://www.playframework.org/documentation/1.2.3/production

log4j.rootLogger=ERROR, Rolling

log4j.logger.play=INFO

# Rolling files
log4j.appender.Rolling=org.apache.log4j.Rolli开发者_StackOverflow社区ngFileAppender
log4j.appender.Rolling.File=application.log
log4j.appender.Rolling.MaxFileSize=1MB
log4j.appender.Rolling.MaxBackupIndex=100
log4j.appender.Rolling.layout=org.apache.log4j.PatternLayout
log4j.appender.Rolling.layout.ConversionPattern=%d{ABSOLUTE} %-5p ~ %m%n

When I run the app with play run where is application.log created?

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With this config, it will be in the working directory of the application. It's maybe easier and more deterministic to put an absolute path in there.