Elli Albek wrote:
Thomas,
My given name is is Mark. Thomas is my family name.
what is the issue with javax.imageio? Do they really use
context class loader for loading static variables?
Yes. First call to most methods in that library trigger a call to
sun.awt.AppContext.getAppContext() which
Gerwood Stewart wrote:
Tomact seems to have retained 1 on the WebappClassLoader instances.
I have two questions at this point:
1. From the Javadocs both WebappClassLoader and WebappLoader are class
loaders. What are the differences and why does Tomcat use both?
WebappClassLoader is the
Managing class loaders is done in the JVM. Tomcat cannot force the JVM
to garbage collect class loaders, in the same way that it cannot force
the JVM to garbage collect any object.
If the class loader is unreachable, and all other objects that this
class loader provided are also unreachable, then
...@sustainlane.com]
Sent: Monday, November 09, 2009 5:53 PM
To: Tomcat Users List
Subject: Re: WebappClassLoader and undeploy
Managing class loaders is done in the JVM. Tomcat cannot force the JVM to
garbage collect class loaders, in the same way that it cannot force the JVM to
garbage collect
From: Jorge Medina [mailto:jmed...@e-dialog.com]
Subject: RE: WebappClassLoader and undeploy
Does the JVM perform class unloading by default?
Usually. However, the JVM version and the choice of GC algorithm may make it
impossible to unload classes. For example, the concurrent collectors
To: Tomcat Users List
Subject: Re: WebappClassLoader and undeploy
Gerwood Stewart wrote:
Tomact seems to have retained 1 on the WebappClassLoader instances.
I have two questions at this point:
1. From the Javadocs both WebappClassLoader and WebappLoader are class
loaders. What
I'm going to try and find a slightly old version of java and check
it's behaviour...
Gerwood
From: Elli Albek [e...@sustainlane.com]
Sent: Tuesday, 10 November 2009 9:52 AM
To: Tomcat Users List
Subject: Re: WebappClassLoader and undeploy
Managing class
Gerwood Stewart wrote:
Mark
2. Why would Tomcat be cleaning up the WebappLoader instance everytime
successfully but seems to 'hang-on' to the WebappClassLoader instance?
My money is on it being JVM code rather than Tomcat code that is hanging
onto the WebappClassLoader. Are you testing
Gerwood Stewart wrote:
Elli
I understand most of this. I do several things such as forcing a GC before
doing the heap dump, from what you are say this may not be enough?
Either way I'm not looking for an instance of the class to simply be there
I'm looking at the GC Roots.
I also
Mark
Thanks. I suppose I'd better get back to identifying the real problems then. :D
Gerwood
From: Mark Thomas [ma...@apache.org]
Sent: Tuesday, 10 November 2009 10:48 AM
To: Tomcat Users List
Subject: Re: WebappClassLoader and undeploy
Gerwood Stewart
From: Mark Thomas [ma...@apache.org]
Sent: Tuesday, 10 November 2009 10:48 AM
To: Tomcat Users List
Subject: Re: WebappClassLoader and undeploy
Gerwood Stewart wrote:
Elli
I understand most of this. I do several things such as forcing a GC before
doing the heap dump, from what you
Thomas, what is the issue with javax.imageio? Do they really use
context class loader for loading static variables?
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