We are seeing the following message when deploying a WAR bundle and starting
karaf 3.0.1:
admin@NextGate ()> log4j:WARN No appenders could be found for logger
(org.springframework.web.servlet.DispatcherServlet).
log4j:WARN Please initialize the log4j system properly.
I was told to remove log4j and use 'mvn dependency:tree' to determine how
the transitive dependency is happening:
i executed the following cmd: mvn dependency:tree -Dverbose -Dincludes=log4j
10:28 [INFO] --- maven-dependency-plugin:2.8:tree (default-cli) @
RelationManager-OSGi ---
[INFO]
com.nextgate.mm.relation.deploys:RelationManager-OSGi:war:1.0.0-SNAPSHOT
[INFO] +- org.slf4j:slf4j-log4j12:jar:1.7.2:compile
[INFO] | \- (log4j:log4j:jar:1.2.16:compile - version managed from 1.2.17;
omitted for duplicate)
[INFO] \- log4j:log4j:jar:1.2.16:compile
I tried to remove the log4j reference in the bundle-classpath for
maven-bundle-plugin config but starting seeing other exceptions
(ClassNotFoundExceptions for log4j classes).
This is what is relevant in the bundle-classpath for the maven-bundle-plugin
section in pom.xml for this WAR project. I have tried removing
log4j-1.2.16.jar and slf4j-api-1.7.2.jar and see various exceptions in
karaf.log.
<Bundle-ClassPath>.
...
,WEB-INF/lib/log4j-1.2.16.jar
,WEB-INF/lib/slf4j-api-1.7.2.jar
,WEB-INF/lib/slf4j-log4j12-1.7.2.jar
...
</Bundle-ClassPath>
Now I have finally resorted to including a log4j.xml file in the root of the
WAR so that log4j will find it in the classpath. Now the WARN logging above
to the karaf console is gone but the logging for the file appender has a
different format than what is in the karaf.log.
Here is my current log4j.xml config. I was thinking about using
"./data/log/karaf.log" and appending to that log instead of a test.log.
<appender name="FILE" class="org.apache.log4j.RollingFileAppender">
<layout class="org.apache.log4j.PatternLayout">
</layout>
</appender>
Am I missing something simple here (i.e. making this too complicated as a
solution)? Any assistance is appreciated. thx.
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