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Posted to log4j-dev@logging.apache.org by Kevin Ng <nk...@live.com> on 2010/09/20 09:48:57 UTC

Problem on Log4j: How to include custom into JBoss (log4j.xml)?

TransFilter is a custom filter that I have created, a .java file.
This run fine as Java Application.


                
    

        
        
        
        
            
        
        



      
      
     


When I tried to convert into JBoss log4j and error occur.
File located: ../server/default/conf/log4j.xml


        
        
        
        
            
        
        
    


      
      
     


Error occur:

log4j:ERROR Could not instantiate class [log4j.TransFilter].
java.lang.ClassNotFoundException: log4j.TransFilter
        at java.net.URLClassLoader$1.run(URLClassLoader.java:199)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.net.URLClassLoader.findClass(URLClassLoader.java:187)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:289)
        at java.lang.ClassLoader.loadClass(ClassLoader.java:235)
        at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302)
        at java.lang.Class.forName0(Native Method)
        at java.lang.Class.forName(Class.java:141)
        at org.apache.log4j.helpers.Loader.loadClass(Loader.java:160)
        at
org.apache.log4j.helpers.OptionConverter.instantiateByClassName(Optio
nConverter.java:309)
        at
org.apache.log4j.xml.DOMConfigurator.parseFilters(DOMConfigurator.jav
a:269)
        at
org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.ja
va:190)
        at
org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurat
or.java:140)
        at
org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfi
gurator.java:153)
        at
org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOM
Configurator.java:415)
        at
org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:3
84)
        at
org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:783)
        at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:666)
        at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:616)
        at
org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
:602)
        at
org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:6
97)
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Re: Problem on Log4j: How to include custom into JBoss (log4j.xml)?

Posted by Jacob Kjome <ho...@visi.com>.
On Mon, 20 Sep 2010 18:42:04 -0700 (PDT)
  Kevin Ng <nk...@live.com> wrote:
> 
> Thank you for replying...
> I'm a newbie, can you further guide me in solving this problem?
> Question:
> 1. How to configure child-first classloading for webapps?

Depends on what server you use.  Given that you use JBoss, I suggest looking 
this up in the JBoss docs.  I don't personally use JBoss, but I know it 
supports child-first classloading as a configuration option.  Ask in a JBoss 
forum if you are unable to find this in the JBoss docs.

> 2. How to place both my custom Filter **and** log4j.jar in WEB-INF/lib?

Not really sure how to say this any more clearly?....

WEB-INF/lib/log4j.jar
WEB-INF/lib/myJarContainingLog4jCustomFilterClass.jar


Jake

> 
> Kevin.
> 
> 
> Jacob Kjome wrote:
>> 
>> It's pretty clear that your "log4j.TransFilter" is loaded by a ClassLoader
>> that is
>> a child of the ClassLoader that loads log4j.jar.  Your class must be
>> loaded by the
>> same, or parent, classloader to that of Log4j.
>> 
>> So, for instance, if Log4j is loaded from some global lib directory in
>> JBoss, then
>> you probably should place your custom Filter class/jar in that same
>> directory, as
>> it will definitely not be found if loaded from, for instance, WEB-INF/lib
>> (unless
>> you configure child-first classloading for webapps and place BOTH your
>> custom
>> Filter **and** log4j.jar in WEB-INF/lib).
>> 
>> 
>> Jake
>> 
>> 
>> On 9/20/2010 1:49 AM, Kevin Ng wrote:
>>> TransFilter is a custom filter that I have created, a .java file. This
>>> run fine as Java Application. When I tried to convert into JBoss log4j
>>> and error occur. File located: ../server/default/conf/log4j.xml Error
>>> occur: log4j:ERROR Could not instantiate class [log4j.TransFilter].
>>> java.lang.ClassNotFoundException: log4j.TransFilter at
>>> java.net.URLClassLoader$1.run(URLClassLoader.java:199) at
>>> java.security.AccessController.doPrivileged(Native Method) at
>>> java.net.URLClassLoader.findClass(URLClassLoader.java:187) at
>>> java.lang.ClassLoader.loadClass(ClassLoader.java:289) at
>>> java.lang.ClassLoader.loadClass(ClassLoader.java:235) at
>>> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at
>>> java.lang.Class.forName0(Native Method) at
>>> java.lang.Class.forName(Class.java:141) at
>>> org.apache.log4j.helpers.Loader.loadClass(Loader.java:160) at
>>> org.apache.log4j.helpers.OptionConverter.instantiateByClassName(Optio
>>> nConverter.java:309) at
>>> org.apache.log4j.xml.DOMConfigurator.parseFilters(DOMConfigurator.jav
>>> a:269) at
>>> org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.ja
>>> va:190) at
>>> org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurat
>>> or.java:140) at
>>> org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfi
>>> gurator.java:153) at
>>> org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOM
>>> Configurator.java:415) at
>>> org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:3
>>> 84) at
>>> org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:783) at
>>> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
>>> :666) at
>>> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
>>> :616) at
>>> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
>>> :602) at
>>> org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:6 97)
>>> ------------------------------------------------------------------------
>>> View this message in context: Problem on Log4j: How to include custom
>>> into JBoss (log4j.xml)?
>>> <http://old.nabble.com/Problem-on-Log4j%3A-How-to-include-custom-%3Cfilter-%3E-into-JBoss-%28log4j.xml%29--tp29756960p29756960.html>
>>> Sent from the Log4j - Dev mailing list archive
>>> <http://old.nabble.com/Log4j---Dev-f153.html> at Nabble.com.
>> 
>> ---------------------------------------------------------------------
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>> For additional commands, e-mail: log4j-dev-help@logging.apache.org
>> 
>> 
>> 
> 
> -- 
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> Sent from the Log4j - Dev mailing list archive at Nabble.com.
> 
> 
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Re: Problem on Log4j: How to include custom into JBoss (log4j.xml)?

Posted by Kevin Ng <nk...@live.com>.
Thank you for replying...
I'm a newbie, can you further guide me in solving this problem?
Question:
1. How to configure child-first classloading for webapps?
2. How to place both my custom Filter **and** log4j.jar in WEB-INF/lib?

Kevin.


Jacob Kjome wrote:
> 
> It's pretty clear that your "log4j.TransFilter" is loaded by a ClassLoader
> that is
> a child of the ClassLoader that loads log4j.jar.  Your class must be
> loaded by the
> same, or parent, classloader to that of Log4j.
> 
> So, for instance, if Log4j is loaded from some global lib directory in
> JBoss, then
> you probably should place your custom Filter class/jar in that same
> directory, as
> it will definitely not be found if loaded from, for instance, WEB-INF/lib
> (unless
> you configure child-first classloading for webapps and place BOTH your
> custom
> Filter **and** log4j.jar in WEB-INF/lib).
> 
> 
> Jake
> 
> 
> On 9/20/2010 1:49 AM, Kevin Ng wrote:
>> TransFilter is a custom filter that I have created, a .java file. This
>> run fine as Java Application. When I tried to convert into JBoss log4j
>> and error occur. File located: ../server/default/conf/log4j.xml Error
>> occur: log4j:ERROR Could not instantiate class [log4j.TransFilter].
>> java.lang.ClassNotFoundException: log4j.TransFilter at
>> java.net.URLClassLoader$1.run(URLClassLoader.java:199) at
>> java.security.AccessController.doPrivileged(Native Method) at
>> java.net.URLClassLoader.findClass(URLClassLoader.java:187) at
>> java.lang.ClassLoader.loadClass(ClassLoader.java:289) at
>> java.lang.ClassLoader.loadClass(ClassLoader.java:235) at
>> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at
>> java.lang.Class.forName0(Native Method) at
>> java.lang.Class.forName(Class.java:141) at
>> org.apache.log4j.helpers.Loader.loadClass(Loader.java:160) at
>> org.apache.log4j.helpers.OptionConverter.instantiateByClassName(Optio
>> nConverter.java:309) at
>> org.apache.log4j.xml.DOMConfigurator.parseFilters(DOMConfigurator.jav
>> a:269) at
>> org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.ja
>> va:190) at
>> org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurat
>> or.java:140) at
>> org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfi
>> gurator.java:153) at
>> org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOM
>> Configurator.java:415) at
>> org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:3
>> 84) at
>> org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:783) at
>> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
>> :666) at
>> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
>> :616) at
>> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
>> :602) at
>> org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:6 97)
>> ------------------------------------------------------------------------
>> View this message in context: Problem on Log4j: How to include custom
>> into JBoss (log4j.xml)?
>> <http://old.nabble.com/Problem-on-Log4j%3A-How-to-include-custom-%3Cfilter-%3E-into-JBoss-%28log4j.xml%29--tp29756960p29756960.html>
>> Sent from the Log4j - Dev mailing list archive
>> <http://old.nabble.com/Log4j---Dev-f153.html> at Nabble.com.
> 
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: log4j-dev-unsubscribe@logging.apache.org
> For additional commands, e-mail: log4j-dev-help@logging.apache.org
> 
> 
> 

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Re: Problem on Log4j: How to include custom into JBoss (log4j.xml)?

Posted by Jacob Kjome <ho...@visi.com>.
It's pretty clear that your "log4j.TransFilter" is loaded by a ClassLoader that is
a child of the ClassLoader that loads log4j.jar.  Your class must be loaded by the
same, or parent, classloader to that of Log4j.

So, for instance, if Log4j is loaded from some global lib directory in JBoss, then
you probably should place your custom Filter class/jar in that same directory, as
it will definitely not be found if loaded from, for instance, WEB-INF/lib (unless
you configure child-first classloading for webapps and place BOTH your custom
Filter **and** log4j.jar in WEB-INF/lib).


Jake


On 9/20/2010 1:49 AM, Kevin Ng wrote:
> TransFilter is a custom filter that I have created, a .java file. This
> run fine as Java Application. When I tried to convert into JBoss log4j
> and error occur. File located: ../server/default/conf/log4j.xml Error
> occur: log4j:ERROR Could not instantiate class [log4j.TransFilter].
> java.lang.ClassNotFoundException: log4j.TransFilter at
> java.net.URLClassLoader$1.run(URLClassLoader.java:199) at
> java.security.AccessController.doPrivileged(Native Method) at
> java.net.URLClassLoader.findClass(URLClassLoader.java:187) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:289) at
> java.lang.ClassLoader.loadClass(ClassLoader.java:235) at
> java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at
> java.lang.Class.forName0(Native Method) at
> java.lang.Class.forName(Class.java:141) at
> org.apache.log4j.helpers.Loader.loadClass(Loader.java:160) at
> org.apache.log4j.helpers.OptionConverter.instantiateByClassName(Optio
> nConverter.java:309) at
> org.apache.log4j.xml.DOMConfigurator.parseFilters(DOMConfigurator.jav
> a:269) at
> org.apache.log4j.xml.DOMConfigurator.parseAppender(DOMConfigurator.ja
> va:190) at
> org.apache.log4j.xml.DOMConfigurator.findAppenderByName(DOMConfigurat
> or.java:140) at
> org.apache.log4j.xml.DOMConfigurator.findAppenderByReference(DOMConfi
> gurator.java:153) at
> org.apache.log4j.xml.DOMConfigurator.parseChildrenOfLoggerElement(DOM
> Configurator.java:415) at
> org.apache.log4j.xml.DOMConfigurator.parseRoot(DOMConfigurator.java:3
> 84) at
> org.apache.log4j.xml.DOMConfigurator.parse(DOMConfigurator.java:783) at
> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
> :666) at
> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
> :616) at
> org.apache.log4j.xml.DOMConfigurator.doConfigure(DOMConfigurator.java
> :602) at
> org.apache.log4j.xml.DOMConfigurator.configure(DOMConfigurator.java:6 97)
> ------------------------------------------------------------------------
> View this message in context: Problem on Log4j: How to include custom
> into JBoss (log4j.xml)?
> <http://old.nabble.com/Problem-on-Log4j%3A-How-to-include-custom-%3Cfilter-%3E-into-JBoss-%28log4j.xml%29--tp29756960p29756960.html>
> Sent from the Log4j - Dev mailing list archive
> <http://old.nabble.com/Log4j---Dev-f153.html> at Nabble.com.

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