CATALINA_BASE and multiple instances

[David Rush <ya...@davidarush.com>]

I'm trying to get Tomcat 5.5.16 set up for multiple independent 
instances (for use by multiple developers w/out stepping on each others' 
toes) in Windows XP (and eventually 2003 Server).

I've got the binaries installed in c:\Apache\Tomcat5, and this is where 
the environment variable CATALINA_HOME points.

I've got one instance set up in c:\arcims-tomcat, and this is where 
CATALINA_BASE points.

However, when I tried to install log4j, I had to put the .jar files and 
log4j.properties files under CATALINA_HOME/common in order for it to 
work.  Putting them under CATALINA_BASE/common did not work.  Obviously 
this is a problem because then multiple instances, which all share 
CATALINA_HOME would be intermixed in one log file.  It also points to 
the bigger problem of all instances sharing CATALINA_HOME/common for 
everything.

Is there a way to get each instance of tomcat to use its own 
CATALINA_BASE/common directory?

There's also the problem of getting multiple service-based tomcat 
instances to have their own idea of what CATALINA_BASE points to.

David

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Re: CATALINA_BASE and multiple instances

[Rainer Jung <to...@kippdata.de>]

No help for Win services from me, but:

you can configure the tomcat classloaders via catalina.properties. Look 
for the entries named common.loader etc. There you will find the reason, 
why the common loader finds code in CATALINA_HOME/common/lib/*.jar, but 
not in the analogous CATALINA_BASE directory. You can extend that 
configuration using the property ${catalina.base}. You can even 
configure the class loaders differently for various instances using the 
startup option:

-Dcatalina.config=file://${CATALINA_BASE}/conf/catalina.properties

That way you will be able to shrink a tomcat instance in your file 
system to a couple of kilobytes (plus webapps, logs etc.). Al the libs 
will be shared from CATALINA_HOME.

--
Rainer

David Rush wrote:
> I'm trying to get Tomcat 5.5.16 set up for multiple independent 
> instances (for use by multiple developers w/out stepping on each others' 
> toes) in Windows XP (and eventually 2003 Server).
> 
> I've got the binaries installed in c:\Apache\Tomcat5, and this is where 
> the environment variable CATALINA_HOME points.
> 
> I've got one instance set up in c:\arcims-tomcat, and this is where 
> CATALINA_BASE points.
> 
> However, when I tried to install log4j, I had to put the .jar files and 
> log4j.properties files under CATALINA_HOME/common in order for it to 
> work.  Putting them under CATALINA_BASE/common did not work.  Obviously 
> this is a problem because then multiple instances, which all share 
> CATALINA_HOME would be intermixed in one log file.  It also points to 
> the bigger problem of all instances sharing CATALINA_HOME/common for 
> everything.
> 
> Is there a way to get each instance of tomcat to use its own 
> CATALINA_BASE/common directory?
> 
> There's also the problem of getting multiple service-based tomcat 
> instances to have their own idea of what CATALINA_BASE points to.
> 
> David
> 
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> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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Re: CATALINA_BASE and multiple instances

[Markus Schönhaber <ma...@schoenhaber.de>]

David Rush wrote:
> However, when I tried to install log4j, I had to put the .jar files and
> log4j.properties files under CATALINA_HOME/common in order for it to
> work.  Putting them under CATALINA_BASE/common did not work.  Obviously
> this is a problem because then multiple instances, which all share
> CATALINA_HOME would be intermixed in one log file. 

That doesn't seem obvious to me.

> It also points to 
> the bigger problem of all instances sharing CATALINA_HOME/common for
> everything.

As I understand it, the whole point in setting CATALINA_BASE and CATALINA_HOME 
to different values is to have multiple Tomcat instances running from the 
*same* set of binaries and libs. So, to me this seems to be exactly the way 
it's meant to be.

> Is there a way to get each instance of tomcat to use its own
> CATALINA_BASE/common directory?

If there is a way, I know nothing of it.
But, as already suggested, you could run multiple Tomcat instances from 
multiple installation directories. Or you could bundle log4j with the webapps 
that need it instead of putting it in common/lib.

Regards
  mks

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