That warning message has been present since the first commit.  However, I don’t 
recall ever seeing it before. I guess that is because I usually run at error 
level.  

The warning makes sense as it is basically saying the plugin won’t work due to 
a missing dependency.  Can you think of a better way to deal with this?

Ralph


On Mar 23, 2014, at 2:55 PM, Remko Popma <[email protected]> wrote:

> If I run a simple HelloWorld log test program, with a log4j2.xml config that 
> has
> <Configuration status="warn">
> 
> then I get _a lot_ of warnings (see below).
> They seem to be generated by ResolverUtil#addIfMatching when loading plugins.
> Just wondering: has this always been the case, or is this caused by a recent 
> change?
> 
> C:\Users\remko\workspace\log4j-perf\bin>java -cp 
> .;..\lib\log4j-api-2.0-rc2-SNAPSHOT.jar;..\lib\log4j-core-2.0-rc2-SNAPSHOT.jar;..\lib\disruptor-3.2.0.jar
>  LOG4J2_537.HelloWorld
> 2014-03-24 06:48:31,491 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,493 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapJsonAttributeConverter$1.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> com/fasterxml/jackson/core/type/TypeReference
> 2014-03-24 06:48:31,494 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapJsonAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,496 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,498 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackJsonAttributeConverter$1.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> com/fasterxml/jackson/core/type/TypeReference
> 2014-03-24 06:48:31,499 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackJsonAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,500 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/LevelAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,502 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/MarkerAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,503 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/MessageAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,505 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/StackTraceElementAttributeConverter.class'
>  due toa java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,506 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ThrowableAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,512 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/nosql/mongodb/MongoDBConnection$1.class'
>  due to a java.lang.NoClassDefFoundError with message: org/bson/Transformer
> 2014-03-24 06:48:31,626 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/AbstractJMSReceiver.class' due to a 
> java.lang.NoClassDefFoundError withmessage: javax/jms/MessageListener
> 2014-03-24 06:48:31,634 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/JMSQueueReceiver.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/jms/MessageListener
> 2014-03-24 06:48:31,638 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/JMSTopicReceiver.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/jms/MessageListener
> 2014-03-24 06:48:31,644 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/SMTPManager$SMTPManagerFactory$1.class' 
> due to a java.lang.NoClassDefFoundError with message: javax/mail/Authenticator
> 2014-03-24 06:48:31,669 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletContainerInitializer.class' 
> due to a java.lang.NoClassDefFoundError with message: 
> javax/servlet/ServletContainerInitializer
> 2014-03-24 06:48:31,670 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletContextListener.class' due to 
> a java.lang.NoClassDefFoundError with message: 
> javax/servlet/ServletContextListener
> 2014-03-24 06:48:31,671 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletFilter.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/servlet/Filter
> 2014-03-24 06:48:31,686 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,687 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapJsonAttributeConverter$1.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> com/fasterxml/jackson/core/type/TypeReference
> 2014-03-24 06:48:31,689 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapJsonAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,690 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,691 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackJsonAttributeConverter$1.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> com/fasterxml/jackson/core/type/TypeReference
> 2014-03-24 06:48:31,693 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackJsonAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,694 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/LevelAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,695 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/MarkerAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,697 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/MessageAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,698 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/StackTraceElementAttributeConverter.class'
>  due toa java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,700 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ThrowableAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,704 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/nosql/mongodb/MongoDBConnection$1.class'
>  due to a java.lang.NoClassDefFoundError with message: org/bson/Transformer
> 2014-03-24 06:48:31,741 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/AbstractJMSReceiver.class' due to a 
> java.lang.NoClassDefFoundError withmessage: javax/jms/MessageListener
> 2014-03-24 06:48:31,744 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/JMSQueueReceiver.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/jms/MessageListener
> 2014-03-24 06:48:31,747 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/JMSTopicReceiver.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/jms/MessageListener
> 2014-03-24 06:48:31,749 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/SMTPManager$SMTPManagerFactory$1.class' 
> due to a java.lang.NoClassDefFoundError with message: javax/mail/Authenticator
> 2014-03-24 06:48:31,759 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletContainerInitializer.class' 
> due to a java.lang.NoClassDefFoundError with message: 
> javax/servlet/ServletContainerInitializer
> 2014-03-24 06:48:31,761 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletContextListener.class' due to 
> a java.lang.NoClassDefFoundError with message: 
> javax/servlet/ServletContextListener
> 2014-03-24 06:48:31,763 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletFilter.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/servlet/Filter
> 2014-03-24 06:48:31,789 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,790 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapJsonAttributeConverter$1.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> com/fasterxml/jackson/core/type/TypeReference
> 2014-03-24 06:48:31,792 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextMapJsonAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,794 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,796 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackJsonAttributeConverter$1.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> com/fasterxml/jackson/core/type/TypeReference
> 2014-03-24 06:48:31,798 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ContextStackJsonAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,800 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/LevelAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,801 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/MarkerAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,803 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/MessageAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,804 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/StackTraceElementAttributeConverter.class'
>  due toa java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,805 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/jpa/converter/ThrowableAttributeConverter.class'
>  due to a java.lang.NoClassDefFoundError with message: 
> javax/persistence/AttributeConverter
> 2014-03-24 06:48:31,808 WARN Could not examine class 
> 'org/apache/logging/log4j/core/appender/db/nosql/mongodb/MongoDBConnection$1.class'
>  due to a java.lang.NoClassDefFoundError with message: org/bson/Transformer
> 2014-03-24 06:48:31,840 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/AbstractJMSReceiver.class' due to a 
> java.lang.NoClassDefFoundError withmessage: javax/jms/MessageListener
> 2014-03-24 06:48:31,843 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/JMSQueueReceiver.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/jms/MessageListener
> 2014-03-24 06:48:31,845 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/JMSTopicReceiver.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/jms/MessageListener
> 2014-03-24 06:48:31,849 WARN Could not examine class 
> 'org/apache/logging/log4j/core/net/SMTPManager$SMTPManagerFactory$1.class' 
> due to a java.lang.NoClassDefFoundError with message: javax/mail/Authenticator
> 2014-03-24 06:48:31,865 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletContainerInitializer.class' 
> due to a java.lang.NoClassDefFoundError with message: 
> javax/servlet/ServletContainerInitializer
> 2014-03-24 06:48:31,866 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletContextListener.class' due to 
> a java.lang.NoClassDefFoundError with message: 
> javax/servlet/ServletContextListener
> 2014-03-24 06:48:31,868 WARN Could not examine class 
> 'org/apache/logging/log4j/core/web/Log4jServletFilter.class' due to a 
> java.lang.NoClassDefFoundError with message: javax/servlet/Filter
> 06:48:31.945 INFO  LOG4J2_537.HelloWorld 28 main - Hello, World!
> C:\Users\remko\workspace\log4j-perf\bin>


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