OK. If all 3 wars are using the same Log4j jars then you can only have a single 
ContextSelector.

Ralph

> On Apr 6, 2022, at 11:17 AM, Pooja Pandey <pooja.pan...@asg.com.INVALID> 
> wrote:
> 
> Webapps wars path is like: installation directory/soa-dir/webapps/
> 
> Along with various other product libs, log4j2 jars and log4j2 propertie file 
> are placed under soa-dir/lib. This path is accessible by all 3 wars. I cannot 
> make any changes in 2 wars which we are fetching from artifactory.
> 
> 
> 
> Get Outlook for iOS<https://aka.ms/o0ukef>
> ________________________________
> From: Ralph Goers <ralph.go...@dslextreme.com>
> Sent: Wednesday, April 6, 2022 11:33:55 PM
> To: Log4J Users List <log4j-user@logging.apache.org>
> Subject: Re: can we set log4j property 'Log4jContextSelector' per webapps war
> 
> *** External email: Verify sender before opening attachments or links ***
> 
> 
> Where are the Log4j jars located?
> 
> Ralph
> 
>> On Apr 6, 2022, at 6:34 AM, Pooja Pandey <pooja.pan...@asg.com.INVALID> 
>> wrote:
>> 
>> Hi,
>> 
>> In my application, I have 2 processes running and there are 3 webapps war 
>> files which get deployed in tomcat version 9.0.60. Out of these 3 war files, 
>> one war file is internal to my application while other 2 are coming as final 
>> artifacts from artifiactory.
>> 
>> My war uses a custom logger and custom ContextSelector, however other 2 wars 
>> from artifactory uses standard logger and standard ContextSelector.
>> 
>> I have defined below system property as a static block in custom logger, 
>> however for some unknown reason when my war gets deployed this log4j jars 
>> don't find this property and leads to ClassCastException 
>> "java.lang.ClassCastException: 
>> org.apache.logging.log4j.core.selector.ContextSelector cannot be cast to 
>> logger.log4j2.CustomLog4j2ContextSelector". To fix this I have placed 
>> 'log4j2.component.properties' file on log4j jars class path, but with this 
>> fix, following harmless error get logged for other 2 wars 
>> "java.lang.ClassCastException: Cannot cast 
>> logger.log4j2.CustomLog4j2ContextSelector to 
>> org.apache.logging.log4j.core.selector.ContextSelector".
>> 
>> I am looking for help to come up with a solution where, when my war gets 
>> deployed then custom logger context 
>> "logger.log4j2.CustomLog4j2ContextSelector" should be used while when other 
>> 2 wars get deployed then  
>> "org.apache.logging.log4j.core.selector.ContextSelector" should be used. 
>> Please let me know if you have any idea on this.
>> 
>> static {
>>   System.setProperty("Log4jContextSelector", 
>> "logger.log4j2.CustomLog4j2ContextSelector");
>> }
>> 
>> 
>> Content of file 'log4j2.component.properties' ->
>> Log4jContextSelector=logger.log4j2.CustomLog4j2ContextSelector
> 
> 
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