So... has it always been like this? I think I would have remembered, as it is quite noisy. Could this be because of a recent change?
On Mon, Mar 24, 2014 at 7:14 AM, Matt Sicker <[email protected]> wrote: > I noticed that today, too. From the looks of it, I don't think any of > those warnings are a big deal. They're just indicating that those scanned > plugins can't be used because they depend on optional dependencies. This is > actually part of why I support using a more modular architecture over an > optional class-based approach like we have now. In such a modular > architecture, you'd only use the JARs containing the plugins you want > (which should speed up plugin search). > > tl;dr: those warning messages look harmless and might be better off placed > in the INFO level. That, or we could maintain a list of optional class > names related to the optional plugins that we can filter for in those log > messages for more information (e.g., log that certain plugins can't be > loaded due to missing dependencies and an informative message on how to > handle that). > > WARNING: OSGi rambling and brainstorming below! > > Then again, in an OSGi bundle interface for log4j-core (e.g., > log4j-core-bundle or even just use log4j-osgi as the location for this > code), we could scan over the annotated classes (@Plugin and such), > generate a plugins.dat (or use an existing OSGi file format like the XML > one for declarative services; it looks rather compatible with our existing > plugin architecture) for each bundle, and then the OSGi bundle that > integrates them all (core bundle, not the API) can just load those XML > files and use OSGi's declarative services management to load log4j plugins > as necessary. > > > On 23 March 2014 16:55, 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> >> > > > > -- > Matt Sicker <[email protected]> >
