RE: Problems with 1.1b1
On Mon, 1 Apr 2002, Ronel Sumibcay wrote:
Date: Mon, 1 Apr 2002 11:37:04 -0800
From: Ronel Sumibcay [EMAIL PROTECTED]
Reply-To: Struts Developers List [EMAIL PROTECTED]
To: 'Struts Developers List' [EMAIL PROTECTED]
Subject: RE: Problems with 1.1b1
I take back where the fix should take place. Its really a J2EE issue so the
fix should really take place in the servlet container before it calls the
init() method of a preloaded servlet.
Folks with commit priveledges...what do you guys think? Will it hurt to have
this change in the ActionServet's init() method? Should struts attempt to
cater to partially compliant J2EE servlet containers? Or should I take this
problem to the tomcat and jrun lists?
The answer to these questions will help me decide if i should make a
struts-myfix.jar or wait for a stable strtus 1.1 with the fix, or wait for
jrun with a bug fix.
Thanks.
There are a couple of dimensions to this issue:
* J2EE 1.3 (and therefore Servlet 2.3) require that the thread context
class loader be initialized appropriately for all web applications.
For example, Tomcat 4 does this.
* Such support was *not* required in J2EE 1.3 (and therefore Servlet 2.2)
environments, but it is widely supported.
* Tomcat 3.x purports to support this feature, but IIRC you have to
explicitly configure it in server.xml by including a particular
interceptor or something. Have you got this set up correctly?
* If you have indeed configured this as required, I would suggest it is
probably a Tomcat 3.3 bug -- it should set up the same context class
loader for actually loading the servlet class (which fires off the
getLog() initializers) as it does when calling the service() method.
* The issue is not Struts-specific ... it would affect *any* web app
that uses the recommended logger discovery mechanism, fired when the
servlet is initially loaded.
Given that, has anyone reported this as a Tomcat 3.3 bug?
-ronel
Craig
-Original Message-
From: Ronel Sumibcay [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 29, 2002 3:59 PM
To: 'Struts Developers List'
Subject: RE: Problems with 1.1b1
The problem may be that the servlet engine may not be calling
Thread.setContextClassLoader(ClassLoader) when initializing a servlet from
preload.
This seems to be the case for JRun3.1. It may be the same for Tomcat 3.3a.
I've made the fix to my ActionServlet, but I think it really needs to be
done in LogFactory.findClassLoader(). The fix for ActionServlet involves
moving the LogFactory.getLog() into the init() method of ActionServlet
public void init()
{
Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader(
));
log = LogFactory.getLog(this.getClass());
initInternal();
initOther();
initServlet();
...
}
The LogFactory.findClassLoader() checks for null to the call to
Thread.currentThread().getContextClassLoader(), but according to the docs it
either the primordial classloader or the classloader set when the thread was
created. It seems like it was never set, so the primordial classloader is
being returned, thus the ClassNotFoundExceptions.
Hope this helps
-ronel
-Original Message-
From: Martin Cooper [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 22, 2002 10:15 PM
To: Struts Developers List
Subject: Re: Problems with 1.1b1
Unfortunately, you're not the only one seeing these problems. I really
thought I'd tested the struts-example app with four different containers
(Tomcat 3.3a, Tomcat 4.0.3, Resin 1.2.10, Resin 2.0.5) before I released the
beta, but it seems I must not have tested under Tomcat 3.3a. ;-( The other
three work just fine.
Here's what I know so far:
1) The problem is related to class loaders, and possibly to the
LogFactory.findClassLoader() method. The fact that LogFactory.getLog() is
called at (ActionServlet) class initialisation time may also be significant.
2) It is related to the load-on-startup element. If the web app is not
loaded on startup, this error does not occur. (Others do, of course, but we
get past this problem.)
3) The problem can be worked around by copying commons-logging.jar to:
%TOMCAT_HOME%\lib\common
Unfortunately, I'm by no means a class loader expert, so I'm not sure where
to go from here. Hopefully someone who has more class loader knowledge than
I do can chip in now...
--
Martin Cooper
- Original Message -
From: Cedric Dumoulin [EMAIL PROTECTED]
To: Struts Developers List [EMAIL PROTECTED]
Sent: Friday, March 22, 2002 9:50 AM
Subject: Re: Problems with 1.1b1
After playing with different configurations, here are my conclusions :
* 1.1b1 struts-example work fine with tomcat4.0.3 and jdk1.4
* 1.1b1 struts-example doesn't work with tomcat3.3a and jdk1.4 (can't
find
LogFactory.java)
* 1.1b1 struts-example doesn't work with tomcat3.3a and jdk1.3 (can't
find
RE: Problems with 1.1b1
On Mon, 1 Apr 2002, Craig R. McClanahan wrote: * Such support was *not* required in J2EE 1.3 (and therefore Servlet 2.2) environments, but it is widely supported. Err, that should have said J2EE 1.2 rather than 1.3. Craig -- To unsubscribe, e-mail: mailto:[EMAIL PROTECTED] For additional commands, e-mail: mailto:[EMAIL PROTECTED]
RE: Problems with 1.1b1
The problem may be that the servlet engine may not be calling
Thread.setContextClassLoader(ClassLoader) when initializing a servlet from
preload.
This seems to be the case for JRun3.1. It may be the same for Tomcat 3.3a.
I've made the fix to my ActionServlet, but I think it really needs to be
done in LogFactory.findClassLoader(). The fix for ActionServlet involves
moving the LogFactory.getLog() into the init() method of ActionServlet
public void init()
{
Thread.currentThread().setContextClassLoader(this.getClass().getClassLoader(
));
log = LogFactory.getLog(this.getClass());
initInternal();
initOther();
initServlet();
...
}
The LogFactory.findClassLoader() checks for null to the call to
Thread.currentThread().getContextClassLoader(), but according to the docs it
either the primordial classloader or the classloader set when the thread was
created. It seems like it was never set, so the primordial classloader is
being returned, thus the ClassNotFoundExceptions.
Hope this helps
-ronel
-Original Message-
From: Martin Cooper [mailto:[EMAIL PROTECTED]]
Sent: Friday, March 22, 2002 10:15 PM
To: Struts Developers List
Subject: Re: Problems with 1.1b1
Unfortunately, you're not the only one seeing these problems. I really
thought I'd tested the struts-example app with four different containers
(Tomcat 3.3a, Tomcat 4.0.3, Resin 1.2.10, Resin 2.0.5) before I released the
beta, but it seems I must not have tested under Tomcat 3.3a. ;-( The other
three work just fine.
Here's what I know so far:
1) The problem is related to class loaders, and possibly to the
LogFactory.findClassLoader() method. The fact that LogFactory.getLog() is
called at (ActionServlet) class initialisation time may also be significant.
2) It is related to the load-on-startup element. If the web app is not
loaded on startup, this error does not occur. (Others do, of course, but we
get past this problem.)
3) The problem can be worked around by copying commons-logging.jar to:
%TOMCAT_HOME%\lib\common
Unfortunately, I'm by no means a class loader expert, so I'm not sure where
to go from here. Hopefully someone who has more class loader knowledge than
I do can chip in now...
--
Martin Cooper
- Original Message -
From: Cedric Dumoulin [EMAIL PROTECTED]
To: Struts Developers List [EMAIL PROTECTED]
Sent: Friday, March 22, 2002 9:50 AM
Subject: Re: Problems with 1.1b1
After playing with different configurations, here are my conclusions :
* 1.1b1 struts-example work fine with tomcat4.0.3 and jdk1.4
* 1.1b1 struts-example doesn't work with tomcat3.3a and jdk1.4 (can't
find
LogFactory.java)
* 1.1b1 struts-example doesn't work with tomcat3.3a and jdk1.3 (can't
find
LogFactory.java)
Am I the only one having these problems ? Does someone else have tried
and got 1.1b1
running with tomcat3.3.
Of course, the commons logging package is in WEB-INF/lib/..
Cedric
Cedric Dumoulin wrote:
I have downloaded and try the 1.1b1 binaries, and can't get it running
!
I use tomcat 3.2.3 and jdk1.3.
Does someone have successfully tested the binaries distribution ?
When trying the struts-examples, I've got :
java.lang.ExceptionInInitializerError:
org.apache.commons.logging.LogConfigurationException:
java.lang.ClassNotFoundException:
org.apache.commons.logging.impl.LogFactoryImpl
at
org.apache.commons.logging.LogFactory.newFactory(LogFactory.java:497)
at
org.apache.commons.logging.LogFactory.getFactory(LogFactory.java:350)
at
org.apache.commons.logging.LogFactory.getLog(LogFactory.java:381)
at
org.apache.struts.util.MessageResourcesFactory.(MessageResourcesFactory.java
:135)
at
org.apache.struts.util.MessageResources.getMessageResources(MessageResources
.java:557)
at org.apache.struts.taglib.html.HtmlTag.(HtmlTag.java:94)
Cedric
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