[LOG4J2-2418] NullPointerException when closing never used RollingRandomAccessFileAppender

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.10.0, 2.11.1
• Fix Version/s: 3.0.0, 2.11.2
• Component/s: Appenders
• Assignee: Unassigned
• Reporter: Jonas Rutishauser
• Created: 23/Aug/18 10:35
• Updated: 17/Feb/20 02:48
• Resolved: 23/Aug/18 13:52

Description

If a RollingRandomAccessFileAppender is configured using the DirectWriteRolloverStrategy and there is no log event which is passed to this appender there will be a NullPointerException when the configuration is stoped.

java.lang.NullPointerException
at org.apache.logging.log4j.core.appender.rolling.RollingRandomAccessFileManager.closeOutputStream(RollingRandomAccessFileManager.java:168)
at org.apache.logging.log4j.core.appender.OutputStreamManager.releaseSub(OutputStreamManager.java:136)
at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.releaseSub(RollingFileManager.java:266)
at org.apache.logging.log4j.core.appender.AbstractManager.stop(AbstractManager.java:86)
at org.apache.logging.log4j.core.appender.AbstractOutputStreamAppender.stop(AbstractOutputStreamAppender.java:142)
at org.apache.logging.log4j.core.appender.RollingRandomAccessFileAppender.stop(RollingRandomAccessFileAppender.java:223)
at org.apache.logging.log4j.core.config.AbstractConfiguration.stop(AbstractConfiguration.java:360)
at org.apache.logging.log4j.core.AbstractLifeCycle.stop(AbstractLifeCycle.java:136)
at org.apache.logging.log4j.core.LoggerContext.setConfiguration(LoggerContext.java:552)
at org.apache.logging.log4j.core.LoggerContext.reconfigure(LoggerContext.java:619)
at org.apache.logging.log4j.core.LoggerContext.setConfigLocation(LoggerContext.java:605)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.locateContext(ClassLoaderContextSelector.java:157)
at org.apache.logging.log4j.core.selector.ClassLoaderContextSelector.getContext(ClassLoaderContextSelector.java:70)
at org.apache.logging.log4j.core.impl.Log4jContextFactory.getContext(Log4jContextFactory.java:228)
at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:158)
at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:131)
at org.apache.logging.log4j.core.config.Configurator.initialize(Configurator.java:101)
at org.apache.logging.log4j.junit.LoggerContextRule$1.evaluate(LoggerContextRule.java:120)
at org.junit.rules.RunRules.evaluate(RunRules.java:20)
[...]

To reproduce the issue a config may be created wich does not use this appender:

<Configuration status="WARN">
 <Appenders>
  <Console name="Console" target="SYSTEM_OUT"></Console>
  <RollingRandomAccessFile name="DatedLogFile" filePattern="log.%d{yyyyMMdd}" immediateFlush="false">
   <TimeBasedTriggeringPolicy />
   <DirectWriteRolloverStrategy />
  </RollingRandomAccessFile>
 </Appenders>
 <Loggers>
  <Root level="warn">
   <AppenderRef ref="Console" />
  </Root>
 </Loggers>
</Configuration>

Issue Links

• is duplicated by: LOG4J2-2510 RollingRandomAccessFileManager throws NPE in closeOutputStream on shutdown
• is related to: LOG4J2-2247 RollingRandomAccessFile appender with DirectWriteRolloverStrategy fails with a NullPointerException when a header is supplied