[LOG4J2-1815] An exception occurred processing Appender RollingFileMain java.lang.NullPointerException

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.8
• Fix Version/s: 2.8.1
• Assignee: Unassigned
• Reporter: Kirill Rakhman
• Created: 14/Feb/17 08:49
• Updated: 18/Feb/17 18:01
• Resolved: 18/Feb/17 18:01

Description

Extract from the config:

        <RollingFile name="RollingFileMain" fileName="bls-neo4j.log"
                     filePattern="bls-neo4j-%d{yyyy-MM-dd-HH-mm}.log">
            <PatternLayout>
                <Pattern>%level{length=1} %d{yyyy-MM-dd HH:mm:ss} %c{-3} (%F:%L) %m%n</Pattern>
            </PatternLayout>
            <Policies>
                <TimeBasedTriggeringPolicy/>
            </Policies>
            <DefaultRolloverStrategy max="2"/>
            <Filters>
                <ThresholdFilter level="info" onMatch="ACCEPT" onMismatch="NEUTRAL"/>
                <ThresholdFilter level="trace" onMatch="DENY" onMismatch="NEUTRAL"/>
            </Filters>
        </RollingFile>

On startup I get the following exception:

2017-02-14 09:47:01,935 main ERROR An exception occurred processing Appender RollingFileMain java.lang.NullPointerException
	at org.apache.logging.log4j.core.appender.rolling.AbstractRolloverStrategy.getEligibleFiles(AbstractRolloverStrategy.java:107)
	at org.apache.logging.log4j.core.appender.rolling.AbstractRolloverStrategy.getEligibleFiles(AbstractRolloverStrategy.java:96)
	at org.apache.logging.log4j.core.appender.rolling.AbstractRolloverStrategy.getEligibleFiles(AbstractRolloverStrategy.java:89)
	at org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy.purgeAscending(DefaultRolloverStrategy.java:212)
	at org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy.purge(DefaultRolloverStrategy.java:199)
	at org.apache.logging.log4j.core.appender.rolling.DefaultRolloverStrategy.rollover(DefaultRolloverStrategy.java:326)
	at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.rollover(RollingFileManager.java:310)
	at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.rollover(RollingFileManager.java:227)
	at org.apache.logging.log4j.core.appender.rolling.RollingFileManager.checkRollover(RollingFileManager.java:207)
	at org.apache.logging.log4j.core.appender.RollingFileAppender.append(RollingFileAppender.java:267)
	at org.apache.logging.log4j.core.config.AppenderControl.tryCallAppender(AppenderControl.java:156)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender0(AppenderControl.java:129)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppenderPreventRecursion(AppenderControl.java:120)
	at org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:84)
	at org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:448)
	at org.apache.logging.log4j.core.config.LoggerConfig.processLogEvent(LoggerConfig.java:433)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:417)
	at org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:403)
	at org.apache.logging.log4j.core.config.AwaitCompletionReliabilityStrategy.log(AwaitCompletionReliabilityStrategy.java:63)
	at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:146)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessageSafely(AbstractLogger.java:2091)
	at org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:1988)
	at org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1960)
	at org.apache.logging.log4j.spi.AbstractLogger.info(AbstractLogger.java:1297)
	at de.busliniensuche.neo.MainKt.main(Main.kt:48)

Issue Links

• duplicates: LOG4J2-1818 Fix rollover to work when filePattern contains no directory components