This is another reason why separating CATALINA_HOME from CATALINA_BASE is a 
good thing.

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> -----Original Message-----
> From: Christopher Schultz <ch...@christopherschultz.net>
> Sent: Tuesday, April 5, 2022 4:57 PM
> To: users@tomcat.apache.org
> Subject: Re: Tomcat ownership changed spontaneously
> 
> Joel,
> 
> On 4/5/22 10:33, Joel Griffith wrote:
> > I'm running a webapp under Tomcat 9 on Ubuntu 20.04.  We run Tomcat as
> > an ad-hoc system user who owns the Tomcat installation files.
> >
> > On Friday, the app stopped working.  Over the weekend, I determined
> > that the problem was that something had reset the ownership of the
> > Tomcat installation files to the 'tomcat' user so that the webapp no
> > longer had permission to access its own files.  I had to spend a
> > couple of days poring through my notes to figure out what ownership
> > was required for what files and then manually change everything that
> needed it back to our ad-hoc user.
> >
> > Since this change affected only Tomcat files, I can only guess that an
> > update from Tomcat altered the ownership of these files.  Did any
> > recent Tomcat update change file and folder ownership of the Tomcat
> > installation to force them to the 'tomcat' user?
> 
> The Tomcat distribution is just a tarball. When you untar it, you get the
> current-user as the owner of the files.
> 
> Tomcat has no installer for *NIX systems.
> 
> If you use a third-party package for Tomcat (e.g. apt-get), you may be seeing
> something coming from /them/. did you recently get any new updates from
> Ubuntu or any other repositories you use?
> 
> -chris
> 
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