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https://issues.apache.org/jira/browse/LOG4J2-245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13652990#comment-13652990
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Nick Williams commented on LOG4J2-245:
--------------------------------------
I think the more pertinent question is, why are we using sun.* classes in the
first place?
Classes in sun.* are not guaranteed to be in every JVM. In fact, they will NOT
be in certain JVMs like Azul Systems' JVM. As such, you're not supposed to
write code against sun.* classes.
I assume that, in this case, we're using this class because it offers some
performance benefit over getting stack information a supported way. I don't
necessarily disagree with that, if that's the case. Performance benefits are
definitely good and sometimes warrant doing something like this, as long as
there's a backup in case the class doesn't exist. sun.reflect.Reflection seems
to have been a relatively stable, universal class over the past 4 or 5
versions, until Java 8.
> 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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