tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Bob DeRemer <bob.dere...@thingworx.com>
Subject RE: HOW TO: re-deploy or undeploy a webapp when additional files are added after initial deployment
Date Tue, 02 Aug 2011 08:54:37 GMT
Should YourKit be able to pinpoint this?  I've used it for memory and other profiling, but
haven't used it to see what might be holding onto JARs after a webapp has been shutdown.

Thanks again,
Bob

-----Original Message-----
From: Mark Thomas [mailto:markt@apache.org] 
Sent: Tuesday, August 02, 2011 3:52 AM
To: Tomcat Users List
Subject: Re: HOW TO: re-deploy or undeploy a webapp when additional files are added after
initial deployment

On 02/08/2011 02:11, Bob DeRemer wrote:
> Hi Mark,
> 
> Actually, in the logs it does tell me that ExpandWar deleteDir failed.  
> This is because my "extensions" I have are actually JAR files that 
> we're dynamically 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().getContextClassLoader() to a URLClassLoader.
> From a dynamic loading standpoint, it works great!  It allows 
> extension classes in an extension JAR to derive from classes in our 
> built-in product JAR(s) loaded by the same [I'm assuming] webapp 
> classloader.
> 
> The problem is, when I shutdown/undeploy the webapp, everything else 
> gets deleted, 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 load them.  Problem is, I'm not sure why these are not 
> being unloaded.

You'll need to get a profiler to see what is holding on to references to those JARs.

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

Without knowing what is holding on to the reference, it is pretty much impossible to determine
the best way to solve this problem.

Mark

> 
> Thanks in advance, Bob
> 
> -----Original Message----- From: Mark Thomas [mailto:markt@apache.org] 
> 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 are 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 deploying/re-deploying a WAR and there is no eclipse IDE.  In  
>> addition, I am dynamically adding extensions to our webapp without  
>> having to restart our webapp, which is what republishing from Eclipse 
>> 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 before you redeploy.
> 
> Mark
> 
> ---------------------------------------------------------------------
>
> 
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
> 
> 
> ---------------------------------------------------------------------
>
> 
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
> 


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org


---------------------------------------------------------------------
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org


Mime
View raw message