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Posted to dev@logging.apache.org by "Remko Popma (JIRA)" <ji...@apache.org> on 2017/06/30 12:35:00 UTC
[jira] [Closed] (LOG4J2-1908) Cryptic error message when
misconfigured with File and RollingRandomAccessFile appenders targeting
same file
[ https://issues.apache.org/jira/browse/LOG4J2-1908?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Remko Popma closed LOG4J2-1908.
-------------------------------
> Cryptic error message when misconfigured with File and RollingRandomAccessFile appenders targeting same file
> ------------------------------------------------------------------------------------------------------------
>
> Key: LOG4J2-1908
> URL: https://issues.apache.org/jira/browse/LOG4J2-1908
> Project: Log4j 2
> Issue Type: Improvement
> Components: Configurators, Core
> Reporter: Remko Popma
> Assignee: Remko Popma
> Fix For: 2.9
>
>
> When a configuration contains a FileAppender and a RollingRandomAccessFileAppender that target the same file, the below error occurs.
> Admittedly the configuration is wrong, but the error message is misleading or at least not helpful for users. Without intimate understanding of the Log4j internals (how FileManagers work) it is almost impossible to determine that the below error is caused by a misconfiguration, what the problem is and how to fix it.
> The configuration:
> {code}
> <?xml version="1.0" encoding="UTF-8"?>
> <Configuration status="WARN">
> <properties>
> <property name="pattern">%d{ISO8601} %r [%t] %-5level %logger{1.} - %msg%n</property>
> </properties>
> <Appenders>
> <Console name="CONSOLE" target="SYSTEM_OUT" follow="true">
> <PatternLayout pattern="${pattern}" />
> </Console>
> <File name="FILE" fileName="logs/app.log">
> <PatternLayout pattern="${pattern}" />
> </File>
> <RollingRandomAccessFile name="ROLLING"
> fileName="logs/app.log"
> filePattern="logs/%d{yyyyMMdd}/app-%i.log.gz">
> <PatternLayout pattern="${pattern}" />
> <Policies>
> <OnStartupTriggeringPolicy/>
> <SizeBasedTriggeringPolicy size="1 GB" />
> <TimeBasedTriggeringPolicy/>
> </Policies>
> <DefaultRolloverStrategy/>
> </RollingRandomAccessFile>
> </Appenders>
> <Loggers>
> <Root level="DEBUG">
> <AppenderRef ref="CONSOLE" level="WARN"/>
> <AppenderRef ref="FILE" />
> </Root>
> </Loggers>
> </Configuration>
> {code}
> Gives this error:
> {code}
> 2017-05-11 15:52:55,959 main ERROR Unable to inject fields into builder class for plugin type class org.apache.logging.log4j.core.appender.RollingRandomAccessFileAppender, element RollingRandomAccessFile. java.lang.ClassCastException: org.apache.logging.log4j.core.appender.FileManager cannot be cast to org.apache.logging.log4j.core.appender.rolling.RollingRandomAccessFileManager
> at org.apache.logging.log4j.core.appender.rolling.RollingRandomAccessFileManager.getRollingRandomAccessFileManager(RollingRandomAccessFileManager.java:87)
> at org.apache.logging.log4j.core.appender.RollingRandomAccessFileAppender$Builder.build(RollingRandomAccessFileAppender.java:115)
> at org.apache.logging.log4j.core.appender.RollingRandomAccessFileAppender$Builder.build(RollingRandomAccessFileAppender.java:52)
> at org.apache.logging.log4j.core.config.plugins.util.PluginBuilder.build(PluginBuilder.java:122)
> at org.apache.logging.log4j.core.config.AbstractConfiguration.createPluginObject(AbstractConfiguration.java:952)
> at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:892)
> at org.apache.logging.log4j.core.config.AbstractConfiguration.createConfiguration(AbstractConfiguration.java:884)
> at org.apache.logging.log4j.core.config.AbstractConfiguration.doConfigure(AbstractConfiguration.java:508)
> at org.apache.logging.log4j.core.config.AbstractConfiguration.initialize(AbstractConfiguration.java:232)
> at org.apache.logging.log4j.core.config.AbstractConfiguration.start(AbstractConfiguration.java:244)
> at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:545)
> at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:617)
> at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:634)
> at org.apache.logging.log4j.core.LoggerContext.start(LoggerContext.java:229)
> at org.apache.logging.log4j.core.async.AsyncLoggerContext.start(AsyncLoggerContext.java:76)
> at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
> at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
> at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
> at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:122)
> at org.apache.logging.log4j.jul.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:34)
> at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
> at org.apache.logging.log4j.jul.LogManager.getLogger(LogManager.java:89)
> at java.util.logging.LogManager.demandLogger(LogManager.java:551)
> at java.util.logging.Logger.demandLogger(Logger.java:455)
> at java.util.logging.Logger.getLogger(Logger.java:502)
> at com.lmax.disruptor.FatalExceptionHandler.<clinit>(FatalExceptionHandler.java:27)
> at com.lmax.disruptor.dsl.ExceptionHandlerWrapper.<init>(ExceptionHandlerWrapper.java:8)
> at com.lmax.disruptor.dsl.Disruptor.<init>(Disruptor.java:66)
> at com.lmax.disruptor.dsl.Disruptor.<init>(Disruptor.java:105)
> at org.apache.logging.log4j.core.async.AsyncLoggerDisruptor.start(AsyncLoggerDisruptor.java:92)
> at org.apache.logging.log4j.core.async.AsyncLoggerContext.start(AsyncLoggerContext.java:75)
> at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:152)
> at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:45)
> at org.apache.logging.log4j.LogManager.getContext(LogManager.java:194)
> at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getContext(AbstractLoggerAdapter.java:122)
> at org.apache.logging.slf4j.Log4jLoggerFactory.getContext(Log4jLoggerFactory.java:43)
> at org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(AbstractLoggerAdapter.java:46)
> at org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(Log4jLoggerFactory.java:29)
> at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:358)
> at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:383)
> at com.company.project.Main.main(Main.java:1030)
> {code}
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