JBoss容器中多WEB应用,日志信息信息报错的问题

最新推荐文章于 2025-12-02 20:52:13 发布

原创最新推荐文章于 2025-12-02 20:52:13 发布 · 920 阅读

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#jboss #web #log4j #classloader #object #class

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本文解决了一个关于Log4j配置中出现的错误信息问题，该问题源于类加载器不一致导致的类实例无法正常工作。解决方案是通过调整JBoss的配置文件来确保正确的类加载模型。

错误信息如下:

18:32:10,375 INFO [STDOUT] log4j:ERROR A "org.jboss.logging.util.OnlyOnceErrorHandler" object is not assignable to a "org.apache.log4j.spi.ErrorHandler" variable.
18:32:10,375 INFO [STDOUT] log4j:ERROR The class "org.apache.log4j.spi.ErrorHandler" was loaded by
18:32:10,453 INFO [STDOUT] log4j:ERROR [WebappClassLoader
delegate: false
repositories:
/WEB-INF/classes/
----------> Parent Classloader:
java.net.FactoryURLClassLoader@106e02e
] whereas object of type
18:32:10,453 INFO [STDOUT] log4j:ERROR "org.jboss.logging.util.OnlyOnceErrorHandler" was loaded by [org.jboss.system.server.NoAnnotationURLClassLoader@506411].
18:32:10,578 INFO [STDOUT] log4j:ERROR Could not create an Appender. Reported error follows.

解决方法:

One way to solve the classloader issue is by reverting the JBoss configuration
to the old classloading model.
Edit the file
<jboss>/server/default/jbossweb-tomcat55.sar/META-INF/jboss-service.xml
Change the following lines:
<attribute name="Java2ClassLoadingCompliance">true</attribute>
<attribute name="UseJBossWebLoader">true</attribute>
(both are default set to false in jboss-4.0.2).