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From: "Remko Popma (JIRA)" <jira@apache.org>
To: log4j-dev@logging.apache.org
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Subject: [jira] [Commented] (LOG4J2-245) EmptyStackException when logging
 error through JCL bridge
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    [ https://issues.apache.org/jira/browse/LOG4J2-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13653031#comment-13653031 ] 

Remko Popma commented on LOG4J2-245:
------------------------------------

Same question as Nick...
Will the #resolvePackageData method still work correctly if the Stack is empty (after we add defensive code to prevent the EmptyStackException)?
I don't understand the code well enough to answer that question.
                
> EmptyStackException when logging error through JCL bridge
> ---------------------------------------------------------
>
>                 Key: LOG4J2-245
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-245
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Core, JCL Bridge
>    Affects Versions: 2.0-beta5, 2.0-beta6
>            Reporter: Nick Williams
>            Priority: Blocker
>
> Possibly affects earlier versions, too, but I did not check.
> beta5 and beta6 are both unusable with Spring Framework. Any time an error gets logged through log4j-jcl bridge using Spring, the error below appears in the Tomcat log, masking the error that Spring was trying to log and making it very difficult to figure out what happened. I've also included my configuration file below the stack trace. The root error is happening on Tomcat 6 due to Spring bug, and that root problem is unimportant. The important problem is the Log4j error that masks it.
> SEVERE: Exception sending context initialized event to listener instance of class org.springframework.web.context.ContextLoaderListener
> java.util.EmptyStackException
> 	at java.util.Stack.peek(Stack.java:102)
> 	at org.apache.logging.log4j.core.impl.ThrowableProxy.resolvePackageData(ThrowableProxy.java:339)
> 	at org.apache.logging.log4j.core.impl.ThrowableProxy.<init>(ThrowableProxy.java:71)
> 	at org.apache.logging.log4j.core.impl.Log4jLogEvent.<init>(Log4jLogEvent.java:110)
> 	at org.apache.logging.log4j.core.impl.Log4jLogEvent.<init>(Log4jLogEvent.java:81)
> 	at org.apache.logging.log4j.core.config.LoggerConfig.createEvent(LoggerConfig.java:423)
> 	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:344)
> 	at org.apache.logging.log4j.core.Logger.log(Logger.java:110)
> 	at org.apache.logging.log4j.spi.AbstractLoggerWrapper.log(AbstractLoggerWrapper.java:55)
> 	at org.apache.logging.log4j.spi.AbstractLogger.error(AbstractLogger.java:539)
> 	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:319)
> 	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
> 	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4765)
> 	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5210)
> 	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
> 	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:726)
> 	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:702)
> 	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:698)
> 	at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1491)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:491)
> 	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:792)
> 	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:468)
> 	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:415)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:491)
> 	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)
> 	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)
> 	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:792)
> 	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1465)
> 	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:75)
> 	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1306)
> 	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1398)
> 	at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:827)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:491)
> 	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:322)
> 	at sun.rmi.transport.Transport$1.run(Transport.java:177)
> 	at sun.rmi.transport.Transport$1.run(Transport.java:174)
> 	at java.security.AccessController.doPrivileged(Native Method)
> 	at sun.rmi.transport.Transport.serviceCall(Transport.java:173)
> 	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:556)
> 	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:811)
> 	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:670)
> 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> 	at java.lang.Thread.run(Thread.java:724)
> <?xml version="1.0" encoding="UTF-8"?>
> <configuration status="WARN">
>     <appenders>
>         <Console name="Console" target="SYSTEM_OUT">
>             <PatternLayout
>                     pattern="%d{HH:mm:ss.SSS} [%t] %-5level %logger{36} - %msg%n"/>
>         </Console>
>         <RollingFile name="WroxFileAppender" fileName="../logs/application.log"
>                      filePattern="../logs/application-%d{MM-dd-yyyy}-%i.log">
>             <PatternLayout>
>                 <pattern>%d{HH:mm:ss.SSS} [%t] %X{id} %X{username} %-5level %c{36} %l: %msg%n</pattern>
>             </PatternLayout>
>             <Policies>
>                 <SizeBasedTriggeringPolicy size="10 MB" />
>             </Policies>
>             <DefaultRolloverStrategy min="1" max="4" />
>         </RollingFile>
>     </appenders>
>     <loggers>
>         <root level="warn">
>             <appender-ref ref="Console" />
>             <appender-ref ref="WroxFileAppender" />
>         </root>
>         <logger name="com.wrox" level="info" />
>         <logger name="org.apache" level="info" />
>         <logger name="org.springframework" level="info" />
>     </loggers>
> </configuration>

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