Can two log4j fileappenders write to the same file?
appender, fileappender, log4j
Solution
Log4j's FileAppender does not allow for two JVM's writing to the same file. If you try, you'll get a corrupt log file. However, logback, log4j's successor, in prudent mode allows two appenders even in different JVMs to write to the same file.
Problem
Forget for a second the question of why on earth would you do such a thing - if, for whatever reason, two FileAppenders are configured with the same file - will this setup work?