@Alessio Pollero

Thanks for your workaround. It works great, but not if prudent mode is set to true.

To address this,  I've added the following code:

@Overridepublic void start() {
     if (isPrudent()) {
        addWarn("Setting \"prudent\" mode to false for LazyRollingFileAppender");
        setPrudent(false);
    }
     super.start();
}