排除log4j版本问题后,仍出现此问题,解决方法:在Tomcat安装目录下conf/catalina.properties文件中设置org.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false。
去Tomcat网站上查看了它的含义:
http://tomcat.apache.org/tomcat-6.0-doc/config/systemprops.html
If true
, Tomcat attempts to null out any static or final
fields from loaded classes when a web application is stopped as a work
around for apparent garbage collection bugs and application coding errors.
There have been some issues reported with log4j when this option is
true
.
Applications without memory leaks using recent JVMs should operate
correctly with this option set to false
.
If not specified, the default value of true
will be used.
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