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The following Layout classes are provided: BasicLayout, HtmlLayout, JSONLayout, and XMLLayout. Latest version as of 2021 was 2.0 of 18 October 2018. [32] log4javascript – Another port for JavaScript. log4javascript is a JavaScript logging framework based on the log4j. The latest version as of 2021 was 1.4.13, released on 23 May 2015. [33]
Version 1.7.35 slf4j-log4j12 module is replaced by slf4j-reload4j. Version 1.7.33 adds support for reload4j via the slf4j-reload4j module. It is the latest stable release. See Download product page. Version 1.7.5 yielded significant improvement in logger retrieval times. Version 1.7.0 added support for varargs, requiring support for Java 5 or ...
Log4Shell (CVE-2021-44228) is a zero-day vulnerability reported in November 2021 in Log4j, a popular Java logging framework, involving arbitrary code execution. [2] [3] The vulnerability had existed unnoticed since 2013 and was privately disclosed to the Apache Software Foundation, of which Log4j is a project, by Chen Zhaojun of Alibaba Cloud's security team on 24 November 2021.
The Log4j flaw can be used to do everything from attacking corporate email systems to impacting real-world infrastructure. (Image: Getty) (Petri Oeschger via Getty Images)
Log4j 2 provides both an API and an implementation. The API can be routed to other logging implementations equivalent to how SLF4J works. Unlike SLF4J, the Log4j 2 API logs Message [2] objects instead of Strings for extra flexibility and also supports Java Lambda expressions. [3] JCL isn't really a logging framework, but a wrapper for one.
Apache log4j 1.3 added many interesting features, but was compatibility with log4j 1.2 was problematic. Many features original developed for log4j 1.3 have been back-ported as companions for log4j 1.2. No further development is anticipated. Apache log4j 2.0 is an experimental development branch for logging services designed for Java 5 and later.
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