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https://issues.apache.org/jira/browse/LOG4J2-2816?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17082433#comment-17082433
]
Denis Orlov commented on LOG4J2-2816:
-------------------------------------
Our slightly obfuscated log4j2.xml
{code}
<?xml version="1.0" encoding="UTF-8"?>
<Configuration packages="algos.util.log4j">
<Appenders>
<Console name="stdout">
<PatternLayout pattern="%date %-5level [%-20thread] %logger{0} -
%msg{nolookups}%xException%n"/>
</Console>
<!-- 'logs.root' sys env defined for Colo SOR -->
<RollingRandomAccessFile name="file"
filename="${sys:logs.root:-logs}/fx-engine.log"
filePattern="${sys:logs.root:-logs}/fx-engine.log.%d{yyyy-MM-dd_HH}.%i"
bufferSize="8192"
immediateFlush="false">
<PatternLayout>
<Pattern>%date %-5level [%-20thread] %logger{0} -
%msg{nolookups}%xException%n</Pattern>
</PatternLayout>
<Policies>
<OnStartupTriggeringPolicy/>
<SizeBasedTriggeringPolicy size="50 MB"/>
<TimeBasedTriggeringPolicy/>
</Policies>
<!--
just in case, we need to bear in mind new rollover deletion
logic inside -
http://logging.apache.org/log4j/2.x/manual/appenders.html#DefaultRolloverStrategy
By default, the max counter is seven, after files will be
overwritten.
-->
<DefaultRolloverStrategy max="65536"/>
</RollingRandomAccessFile>
<!-- 'logs.root' sys env defined for Colo SOR -->
<RollingRandomAccessFile name="errorFile"
filename="${sys:logs.root:-logs}/errors-fx-engine.log"
filePattern="${sys:logs.root:-logs}/errors-fx-engine.log.%d{yyyy-MM-dd_HH}.%i"
immediateFlush="true">
<Filters>
<ThresholdFilter level="WARN"/>
</Filters>
<PatternLayout>
<Pattern>%date %-5level [%-20thread] %logger{0} -
%msg{nolookups}%xException%n</Pattern>
</PatternLayout>
<Policies>
<OnStartupTriggeringPolicy/>
<SizeBasedTriggeringPolicy size="50 MB"/>
<TimeBasedTriggeringPolicy/>
</Policies>
<DefaultRolloverStrategy max="65536"/>
</RollingRandomAccessFile>
<!-- 'logs.root' sys env defined for Colo SOR -->
<RollingRandomAccessFile name="metricsFile"
filename="${sys:logs.root:-logs}/metrics/metrics.log"
filePattern="${sys:logs.root:-logs}/metrics/metrics.log.%d{yyyy-MM-dd_HH}.%i"
immediateFlush="false">
<PatternLayout>
<Pattern>%date %-5level %logger{0} -
%msg{nolookups}%xException%n</Pattern>
</PatternLayout>
<Policies>
<OnStartupTriggeringPolicy/>
<SizeBasedTriggeringPolicy size="50 MB"/>
<TimeBasedTriggeringPolicy/>
</Policies>
<DefaultRolloverStrategy max="65536"/>
</RollingRandomAccessFile>
<!-- 'logs.root' sys env defined for Colo SOR -->
<RollingRandomAccessFile name="fwdPointsFile"
filename="${sys:logs.root:-logs}/fwd-points.log"
filePattern="${sys:logs.root:-logs}/fwd-points.log.%d{yyyy-MM-dd_HH}.%i"
immediateFlush="false">
<PatternLayout>
<Pattern>%date %-5level %logger{0} -
%msg{nolookups}%xException%n</Pattern>
</PatternLayout>
<Policies>
<OnStartupTriggeringPolicy/>
<SizeBasedTriggeringPolicy size="50 MB"/>
<TimeBasedTriggeringPolicy/>
</Policies>
<DefaultRolloverStrategy max="65536"/>
</RollingRandomAccessFile>
</Appenders>
<Loggers>
<Logger name="org.springframework" level="INFO"/>
<Logger name="fxoptions.common" level="INFO"/>
<Logger name="statsserver" level="INFO"/>
<Logger name="fx.upstream" level="DEBUG"/>
<Logger name="fx.marketdata" level="DEBUG"/>
<Logger name="fx.marketdata.komodo" level="INFO"/>
<Logger name="fx.marketdata.filtering" level="INFO"/>
<Logger name="marketdata.filtering" level="INFO"/>
<Logger name="komodo.arbitrator" level="INFO"/>
<Logger name="services.ordermgmt" level="DEBUG"/>
<Logger name="services.referencedata" level="INFO"/>
<Logger name="services.streamconnectors " level="DEBUG"/>
<Logger name="services.streamconnectors" level="DEBUG"/>
<Logger name="komodo.switcher" level="INFO"/>
<Logger name="sor" level="DEBUG"/>
<Logger name="sor.breakdown.QuantityRounding" level="INFO"/>
<Logger name="sor.phases.IcebergProcessor" level="INFO"/>
<Logger name="sor.phases.PhaseHelper" level="INFO"/>
<Logger name="sor.phases.smartstop" level="DEBUG"/>
<Logger name="sor.Tickets" level="INFO"/>
<Logger name="state.CrossUpstreamTicket" level="INFO"/>
<Logger name="execution.OpenMarketsSupplier" level="INFO"/>
<Logger name="circuitbreakers.ParentExecutionOvertradeCircuitBreaker"
level="DEBUG"/>
<Logger name="fx.crosses" level="INFO"/>
<Logger name="fx.crosses.referencedata" level="DEBUG"/>
<Logger name="fx.crosses.marketdata.CrossBook" level="INFO"/>
<Logger name="fx.crosses.marketdata.CrossBookFactory" level="INFO"/>
<Logger name="fx.marketdata.scheduled.cross.CrossMdAdapter"
level="INFO"/>
<Logger name="venues" level="DEBUG"/>
<Logger name="fx.execution.spot_equivalents" level="INFO"
additivity="true">
<AppenderRef ref="fwdPointsFile"/>
</Logger>
<Logger
name="fx.execution.spot_equivalents.fp.BaseForwardPointsProvider.fwdPoints"
level="ALL" additivity="false">
<AppenderRef ref="fwdPointsFile"/>
</Logger>
<Logger name="fx.execution.MigAlgoFlaggingService" level="INFO"/>
<Logger name="fx.execution" level="TRACE"/>
<Logger name="fx.fixing" level="DEBUG"/>
<Logger name="komodo" level="INFO"/>
<Logger name="komodo.transport.tnw.lbm.LBMContextWrapper"
level="DEBUG"/>
<Logger name="metrics" level="ALL" additivity="false">
<AppenderRef ref="metricsFile"/>
</Logger>
<Root level="INFO">
<AppenderRef ref="file"/>
<AppenderRef ref="errorFile"/>
</Root>
</Loggers>
</Configuration>
{code}
> NullPointerException from AsyncLogger
> -------------------------------------
>
> Key: LOG4J2-2816
> URL: https://issues.apache.org/jira/browse/LOG4J2-2816
> Project: Log4j 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.13.0
> Reporter: Denis
> Priority: Minor
>
> We've got several times following NullPointerException (example from our
> stdout.log):
>
> {code:java}
> 84449.232: [purging class loader data graph, 0.0000003 secs]
> AsyncLogger error handling event seq=1037012,
> value='org.apache.logging.log4j.core.async.RingBufferLogEvent@2a7b2d78':
> java.lang.NullPointerException: null
> java.lang.NullPointerException
> at
> org.apache.logging.log4j.core.async.RingBufferLogEvent.execute(RingBufferLogEvent.java:161)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEventHandler.onEvent(RingBufferLogEventHandler.java:46)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEventHandler.onEvent(RingBufferLogEventHandler.java:29)
> at
> com.lmax.disruptor.BatchEventProcessor.processEvents(BatchEventProcessor.java:168)
> at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:125)
> at java.lang.Thread.run(Thread.java:748)
> AsyncLogger error handling event seq=1037022,
> value='org.apache.logging.log4j.core.async.RingBufferLogEvent@d5d330f':
> java.lang.NullPointerException: null
> java.lang.NullPointerException
> at
> org.apache.logging.log4j.core.async.RingBufferLogEvent.execute(RingBufferLogEvent.java:161)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEventHandler.onEvent(RingBufferLogEventHandler.java:46)
> at
> org.apache.logging.log4j.core.async.RingBufferLogEventHandler.onEvent(RingBufferLogEventHandler.java:29)
> at
> com.lmax.disruptor.BatchEventProcessor.processEvents(BatchEventProcessor.java:168)
> at com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:125)
> at java.lang.Thread.run(Thread.java:748)
> 84450.232: [deflating idle monitors, 0.0000624 secs]
> {code}
>
> What is interesting this NPEs always preceeded by
> {code}
> 84449.232: [purging class loader data graph, 0.0000003 secs] vm message
> {code}
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