How can I roll over my logfiles automatically at midnight?
What’s the easiest way to turn off all logging, even with a lengthy Log4perl configuration file? I keep getting duplicate log messages! What’s wrong? How can I configure Log::Log4perl to send me email if something happens? How can I write my own appender? How can I drill down on references before logging them? How can I collect all FATAL messages in an extra log file? How can I bundle several log messages into one? I want to log ERROR and WARN messages to different files! How can I do that? On our server farm, Log::Log4perl configuration files differ slightly from host to host. Can I roll them all into one? Log4perl doesn’t interpret my backslashes correctly! I want to suppress certain messages based on their content! My new module uses Log4perl — but what happens if the calling program didn’t configure it? How can I synchronize access to an appender? Can I use Log::Log4perl with log4j’s Chainsaw? How can I run Log::Log4perl under mod_perl? My program already uses warn() and die(). Ho
Long-running applications tend to produce ever-increasing logfiles. For backup and cleanup purposes, however, it is often desirable to move the current logfile to a different location from time to time and start writing a new one. This is a non-trivial task, because it has to happen in sync with the logging system in order not to lose any messages in the process. Luckily, Mark Pfeiffer’s “Log::Dispatch::FileRotate” appender works well with Log::Log4perl to rotate your logfiles in a variety of ways. Note, however, that having the application deal with rotating a log file is not cheap. Among other things, it requires locking the log file with every write to avoid race conditions. There are good reasons to use external rotators like “newsyslog” instead. See the entry “How can I rotate a logfile with newsyslog?” in the FAQ for more information on how to configure it. When using “Log::Dispatch::FileRotate”, all you have to do is specify it in your Log::Log4perl configuration file and your l
