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From: Bob DeRemer <bob.deremer@thingworx.com>
To: Tomcat Users List <users@tomcat.apache.org>
Date: Mon, 1 Aug 2011 18:11:59 -0700
Subject: RE: HOW TO: re-deploy or undeploy a webapp when additional files
 are added after initial deployment
Thread-Topic: HOW TO: re-deploy or undeploy a webapp when additional files
 are added after initial deployment
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Hi Mark,

Actually, in the logs it does tell me that ExpandWar deleteDir failed.  Thi=
s is because my "extensions" I have are actually JAR files that we're dynam=
ically loaded so we don't have to restart the webapp.  I'm using the addUrl=
 hack, but by casting the main webapp's Thread.currentThread().getContextCl=
assLoader() to a URLClassLoader.  From a dynamic loading standpoint, it wor=
ks great!  It allows extension classes in an extension JAR to derive from c=
lasses in our built-in product JAR(s) loaded by the same [I'm assuming] web=
app classloader.=20

The problem is, when I shutdown/undeploy the webapp, everything else gets d=
eleted, but not the JAR(s) that are dynamically loaded.  Tomcat should not =
be holding on to these because I am NOT using the System class loader to lo=
ad them.  Problem is, I'm not sure why these are not being unloaded.

Is there any way to force tomcat to release these?  I tried putting the ant=
iJARLocking=3D"true" in the main Context.xml as well as a local context.xml=
 in META-INF and neither of these worked.

Thanks in advance,
Bob

-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org]=20
Sent: Monday, August 01, 2011 3:44 PM
To: Tomcat Users List
Subject: Re: HOW TO: re-deploy or undeploy a webapp when additional files a=
re added after initial deployment

On 01/08/2011 20:32, Bob DeRemer wrote:
> Thanks, but I need to do this in a production environment, where we're=20
> deploying/re-deploying a WAR and there is no eclipse IDE.  In=20
> addition, I am dynamically adding extensions to our webapp without=20
> having to restart our webapp, which is what republishing from Eclipse=20
> does.

Any messages in the logs? Tomcat 7 will report if it can't delete a file. I=
 don't recall if Tomcat 6 does.

If a file is under the docBase and is not deleted it is because something (=
probably your app) still has the file open. You need to close the files bef=
ore you redeploy.

Mark

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