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Subject: Re: lo4j2.xml in EAR
From: Ralph Goers <ralph.goers@dslextreme.com>
In-Reply-To: 
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Date: Mon, 3 Nov 2014 14:04:49 -0700
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To: Log4J Users List <log4j-user@logging.apache.org>

Do you have a =E2=80=9Ccaused by=E2=80=9D on the NoClassDefFoundError? =20=


Ralph

> On Nov 3, 2014, at 1:46 PM, Paul Benedict <pbenedict@apache.org> =
wrote:
>=20
> Right now my code cannot see the API classes; so I get a
> NoClassDefFoundError. If I can see the classes, that will be a win :-) =
even
> if the functionality will fail.
>=20
>=20
> Cheers,
> Paul
>=20
> On Mon, Nov 3, 2014 at 2:42 PM, Ralph Goers =
<ralph.goers@dslextreme.com>
> wrote:
>=20
>> The Log4j API is going to look for its implementation. It does that =
by
>> looking for a property file using ClassLoader.getResources(). If that =
file
>> cannot be located because it is in a different ClassLoader then you =
will
>> have problems.
>>=20
>> When you say it doesn=E2=80=99t work, what exactly is happening?
>>=20
>> Ralph
>>=20
>>> On Nov 3, 2014, at 12:51 PM, Paul Benedict <pbenedict@apache.org> =
wrote:
>>>=20
>>> The first smart thing to do in Wildfly 8.1 is install a common =
instance
>> of
>>> log4j2. You do this by creating a module. Here are my steps:
>>>=20
>>> 1. Go to <WildFlyHome>/modules
>>> 2. Create folders org/apache/log4j2/main
>>> 3. Drop in the api jar.
>>> 4. Create a module.xml with this content:
>>>=20
>>> <?xml version=3D"1.0" encoding=3D"UTF-8"?>
>>> <module xmlns=3D"urn:jboss:module:1.3" name=3D"org.apache.log4j2">
>>>   <resources>
>>>       <resource-root path=3D"log4j-api-2.1.jar"/>
>>>   </resources>
>>> </module>
>>>=20
>>> PS: I could have also dropped in the "core" jar but I am being
>>> conservative. Since I can't get anything to work, this is the =
minimal.
>>>=20
>>> Then inside my ejb-jar project, I create myself a
>>> META-INF/jboss-deployment-descriptor.xml file like this:
>>>=20
>>> <jboss-deployment-structure =
xmlns=3D"urn:jboss:deployment-structure:1.0">
>>> <deployment>
>>>   <dependencies>
>>>     <module name=3D"org.apache.log4j2" />
>>>   </dependencies>
>>> </deployment>
>>> </jboss-deployment-structure>
>>>=20
>>> That should automatically map the jar into my module's classpath. =
I've
>> done
>>> this before but I am obviously missing something because it's not
>> working.
>>> If anyone can help by following these steps and figuring this out, =
I'd be
>>> happy to hear someone's success story.
>>>=20
>>> Cheers,
>>> Paul
>>>=20
>>> On Sat, Nov 1, 2014 at 7:00 PM, Ralph Goers =
<ralph.goers@dslextreme.com>
>>>> wrote:
>>>>=20
>>>>> I am not aware that we have implemented any specific support for =
EARs.
>>>>> That said, I am not sure we need to. I=E2=80=99ve also looked at =
the Log4j 1.x
>> code
>>>>> and don=E2=80=99t see anything specific to supporting META-INF or =
EARs.
>>>>>=20
>>>>> Log4j will load log4j2.xml from the classpath, so you should be =
able to
>>>>> do something like what is described at
>>>>> =
https://developer.jboss.org/wiki/HowToPutAnExternalFileInTheClasspath
>> <
>>>>> =
https://developer.jboss.org/wiki/HowToPutAnExternalFileInTheClasspath
>>> .
>>>>> I believe you can also place it in the /lib directory or whatever
>> directory
>>>>> is defined in the library-directory element of the deployment
>> descriptor.
>>>>> See
>>>>>=20
>> =
http://javahowto.blogspot.com/2006/10/use-library-directory-in-javaee-5-ap=
ps.html
>>>>> <
>>>>>=20
>> =
http://javahowto.blogspot.com/2006/10/use-library-directory-in-javaee-5-ap=
ps.html
>>>>>> .
>>>>>=20
>>>>> What app server are you using?
>>>>>=20
>>>>> Ralph
>>>>>=20
>>>>>=20
>>>>>=20
>>>>>> On Nov 1, 2014, at 10:56 AM, Paul Benedict <pbenedict@apache.org>
>>>>> wrote:
>>>>>>=20
>>>>>> When I used log4j 1.x, I could put my log4j.xml in the
>>>>> <EarRoot>/META-INF
>>>>>> folder and it was found. I did try this with log4j 2.0.2 and the
>>>>>> configuration was not found.
>>>>>>=20
>>>>>> I read this but it only talks about WARs. I don't have a WAR but =
an
>> EAR
>>>>>> with EJB modules.
>>>>>> http://logging.apache.org/log4j/2.x/manual/webapp.html
>>>>>>=20
>>>>>> So is this feature missing in 2.x? Or did I do something wrong?
>>>>>>=20
>>>>>> Cheers,
>>>>>> Paul
>>>>>=20
>>>>=20
>>=20
>>=20
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: log4j-user-unsubscribe@logging.apache.org
>> For additional commands, e-mail: log4j-user-help@logging.apache.org
>>=20
>>=20


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