How to enable logging of Ehcache

In my opinion setting the root logger level to ALL is not a good idea.

This means that ALL log messages of every level will get through (unless you set a threshold on your appenders).

Instead, I suggest you set a sensible root logger level, such as INFO or WARN, and then set the log level of individual loggers if you require more specific information.

This way you are not creating a forest of unnecessary information.

I suggest something like the below:

<appender name="CONSOLE" class="org.apache.log4j.ConsoleAppender"> 
  <param name="Target" value="System.out"/> 
  <layout class="org.apache.log4j.PatternLayout"> 
    <param name="ConversionPattern" value="%d %-5p [%c] %m%n"/>
  </layout>  
</appender> 

<logger name="net.sf.ehcache">
  <level value="DEBUG"/>
</logger>

<root> 
  <priority value ="INFO" /> 
  <appender-ref ref="CONSOLE" /> 
</root>

EhCache logs a lot on DEBUG level. First of all, this configuration snippet filters out all logging statements below INFO:

<root level="info">

Change it to

<root level="ALL">

Secondly

<logger name="net.sf.ehcache">

needs an increased logging level

<logger name="net.sf.ehcache" level="ALL"/> 

You should then see plenty of logging statements from EhCache (and others).