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Posted to log4j-dev@logging.apache.org by "Bill Okara (JIRA)" <ji...@apache.org> on 2016/09/06 21:00:22 UTC
[jira] [Comment Edited] (LOG4J2-1535) KafkaAppender
NullPointerException when putting the related jars in tomcat lib
[ https://issues.apache.org/jira/browse/LOG4J2-1535?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15468545#comment-15468545 ]
Bill Okara edited comment on LOG4J2-1535 at 9/6/16 8:59 PM:
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The issue has nothing to do with having the kafka-client.jar in tomcat/lib. it's only an issue if the webapp tries to init the parent loader (tomcat shared lib loader) with a log4j2 config that uses the kafkaAppender with kafka-client.jar in the tomcat/lib.
was about to get the log4j2 kafkaAppender to work with the kafka-client.jar in the tomcat/lib. just need to workaround it to make sure the parent loader is not trying to use a log4j2 config that uses kafkaAppender.
was (Author: bill-okara):
The issue has nothing to do with having the kafka-client.jar in tomcat/lib. it's only an issue if the webapp tries to initiate the parent loader (tomcat shared lib loader) with a log4j2 config that uses the kafkaAppender with kafka-client.jar in the tomcat/lib.
was about to get the log4j2 kafkaAppender to work with the kafka-client.jar in the tomcat/lib. just need to workaround it to make sure the parent loader is not initiated with a log4j2 config that uses kafkaAppender.
> KafkaAppender NullPointerException when putting the related jars in tomcat lib
> ------------------------------------------------------------------------------
>
> Key: LOG4J2-1535
> URL: https://issues.apache.org/jira/browse/LOG4J2-1535
> Project: Log4j 2
> Issue Type: Improvement
> Components: Appenders
> Affects Versions: 2.6.2
> Environment: Tomcat 7.0.70
> Reporter: Bill Okara
> Attachments: kafka-test-src.tar.gz
>
>
> By putting the log4j2 and kafka appender related jars in tomcat/lib (instead of packaged in WEB-INF/lib), got NullPointerException when initializing the log4j2.xml.
> Steps to reproduce:
> 1) unzip the attached kafka-test-src.tar.gz, build the project with maven:
> > mvn clean package
> 2) get all the dependency jars by:
> > mvn dependency:copy-dependencies
> 3) copy the *.jar from $project/target/dependency/*.jar to tomcat/lib/
> 4) deploy the war to tomcat
> 5) start tomcat
> Will see errors like:
> Caused by: java.lang.NullPointerException at org.apache.kafka.clients.producer.KafkaProducer.close(KafkaProducer.java:658) at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:333) at org.apache.kafka.clients.producer.KafkaProducer.<init>(KafkaProducer.java:188) at org.apache.logging.log4j.core.appender.mom.kafka.DefaultKafkaProducerFactory.newKafkaProducer(DefaultKafkaProducerFactory.java:29) at org.apache.logging.log4j.core.appender.mom.kafka.KafkaManager.startup(KafkaManager.java:86) at org.apache.logging.log4j.core.appender.mom.kafka.KafkaAppender.start(KafkaAppender.java:96) at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:247) at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:496) at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:566)
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