Ever seen duplicate lines in your log4j output? Maybe something like this: Well, the obvious cause is probably duplicate loggers your log4j configuration: As the properties are inherited from the root logger, this is telling log4j that all quartz-classes should send their log to the DefaultConsoleAppender (which the root logger is doing anyway). So we simply have to remove the… Read more »

Log4J is the current de facto standard not only in open source development. It claims to be fast and flexible: speed first, flexibility second. But there are some pitfalls when it comes to the crunch. The costs of a log request consists of a method invocation and an integer comparison. This is typically about 1-20ns (depending on your processor) per… Read more »