Projects / log4j


Log4j is a logging package written in Java. Log4j allows you to log to a file, a, a remote server, or a syslog daemon. The package is designed so that log statements can remain in shipped code without incurring a high performance cost. One distinctive feature of log4j is the notion of hierarchical loggers. Using hierarchical loggers, it is possible to select (at runtime) which log statements are output at arbitrary granularity. Users can choose to implement their own log formats and output strategies.

Operating Systems

Recent releases

  •  04 Nov 2004 12:43

    Release Notes: This version is identical to version 1.2.8, except that several key methods have been deprecated in preparation for version 1.3.0, the next major release of log4j. These changes are intended to enforce the rule that client code should never refer to the Category class directly, but use the Logger class instead. Similarly, client code should not refer to the Priority class but to the Level class instead.

    •  19 Feb 2003 19:19

      Release Notes: This is a purely maintenance release which fixes a parsing problem of log4j configuration files written in XML observed with certain versions of Xerces.

      •  09 Oct 2002 22:03

        Release Notes: This release searches for the file log4j.xml as well as the file during initialization.

        •  01 Aug 2002 17:42

          Release Notes: This is a minor maintenance release. The most significant change is the addition of the "log4j.ignoreTCL" system property.

          •  05 Jul 2002 16:47

            No changes have been submitted for this release.

            Recent comments

            17 Jan 2000 14:30 cgu

            syslog compatibility
            Syslog compatibility has been tested only with the 1.3 version of syslogd on Linux. Other daemons might behave differently.

            UDP is unreliable. Log packets can and often do get lost. Enjoy, Ceki

            18 Nov 1999 06:38 cgu

            Stability of v0.6.1
            Altough log4j is marked a "development" release, it is failrly stable and is being currently used in a number of projects.


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