External context in server.xml

Issue

I have an application which writes files in directories outside the environment jboss. To access these directories, I added in server.xml(inside <Host> label), the following:

<Host>
...
 <Context path="/contexto1" 
          docBase="/dev/shm/directorio1">
 </Context>

 <Context path="/contexto2"   
          docBase="/tmp/directorio2">
 </Context>
...
</Host>



It works fine, but I get this warning in the logs:

WARN  [javax.enterprise.resource.webcontainer.jsf.config] Unable to process deployment descriptor for context '/contexto1'
WARN  [javax.enterprise.resource.webcontainer.jsf.config] Unable to process deployment descriptor for context '/contexto2'

What does it mean?? Am I doing something wrong?