ESXi 5 删除虚拟机硬盘释放空间一点小注意

log4j的additivity属性值默认是设置为true的。可参考其api，地址：http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/Category.html#setAdditivityboolean。

 

描述：Additivity is set to true by default, that is children inherit
the appenders of their ancestors by default. If this variable is
set to

false

then the appenders found in the
ancestors of this category are not used. However, the children
of this category will inherit its appenders, unless the children
have their additivity flag set to

false

too. See
the user manual for more details.

 

默认为true时，就会产生冗余日志。所以只要设置为false，就可以去除冗余了。

 

log4j.rootLogger = INFO, ta

log4j.logger.com.test = INFO, ta
log4j.additivity.com.test = false

 

另外一篇参考文章的地址：http://veerasundar.com/blog/2009/08/log4j-tutorial-additivity-what-and-why/