Pooja Pandey created LOG4J2-3468:
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Summary: can we set log4j property 'Log4jContextSelector' per
webapps war deployment
Key: LOG4J2-3468
URL: https://issues.apache.org/jira/browse/LOG4J2-3468
Project: Log4j 2
Issue Type: Question
Components: Log4j 1.2 bridge
Affects Versions: 2.17.2
Reporter: Pooja Pandey
In my application where I am using custom logger and custom ContextSelector
log4j2 2.17.2 version, 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.
_*static {*_
_*System.setProperty("Log4jContextSelector",
"logger.log4j2.CustomLog4j2ContextSelector");*_
_*}*_
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.
Content of file 'log4j2.component.properties' ->
_*Log4jContextSelector=logger.log4j2.CustomLog4j2ContextSelector*_
But with this fix, for other 2 wars I get following below harmless error(wars
functionality works fine) when I keep 'log4j2.component.properties' file on
log4j jars class path, to fix class cast exception which I was getting earlier
during deployment of my war file.
_*ERROR StatusLogger Unable to create custom ContextSelector. Falling back to
default.*_
_*"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.
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