Instead of piping STDOUT and STDERR to *.out and *.err files in our launch scripts, we should pipe to the POSIX cli logger (/usr/bin/logger) to log to the system logging facility at the desired log level.
Incorporating the system logging facilities is useful for system administrators for troubleshooting and/or auditing. More integration with external logging facilities also means that we reduce our responsibility to maintain/manage the resulting logs to avoid problems (like filling up the local file system with logs), deferring that to utilities dedicated to that responsibility.
The command-line options used for /usr/bin/logger should be enough to associate the logs with the particular process.
(NOTE: Log4j can also be configured to use the system log facility, but that should be done through log4j configuration, with the appropriate log appender.)