Using LogFactoryUtil and defining a custom log file in portal-log4j.xml is not working in plugins

• Type: Bug
• Status: Closed
• Resolution: Won't Fix
• Affects Version/s: 6.2.0 CE RC2
• Fix Version/s: 6.2.0 CE M2
• Component/s: Portal Services, Portal Services > Legacy
• Labels: None
• Environment: OSX 10.8.5 + JDK 1.7.40

I define a FileAppender to create the file mylog.log (where the log messages of my portlet must be saved). The problem is that mylog.log is never created by Liferay.

In my portal-log4j.xml (inside my plugin) I have:

portal-log4j.xml

...
<param name="FileNamePattern" value="@liferay.home@/logs/mylog.log" />
...

And in my portlet I have:

NewPortlet.java

...
private static final Log LOG = LogFactoryUtil.getLog(NewPortlet.class);
...
LOG.info("MY_LOG2");
...

In the console I see the message "16:13:23,695 INFO [http-bio-8080-exec-5][NewPortlet:117] MY_LOG2" but no mylog.log file is created.