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https://issues.apache.org/jira/browse/LOG4J2-465?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13845976#comment-13845976
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Remko Popma commented on LOG4J2-465:
------------------------------------

Thanks for reporting this!
Can you also post your configuration file to help us try to reproduce the issue?

> ThresholdFilter throws NPE
> --------------------------
>
>                 Key: LOG4J2-465
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-465
>             Project: Log4j 2
>          Issue Type: Bug
>          Components: Core
>    Affects Versions: 2.0-beta9
>         Environment: java version "1.6.0_65"
> Java(TM) SE Runtime Environment (build 1.6.0_65-b14-462-11M4609)
> Java HotSpot(TM) 64-Bit Server VM (build 20.65-b04-462, mixed mode)
>            Reporter: Daisuke Baba
>
> ThresholdFilter throws NPE after LoggerContext#reconfigure() is performed.
> ---
>      [java] SEVERE: Exception processing: 662 
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapper@55573de0
>      [java] java.lang.NullPointerException
>      [java]   at 
> org.apache.logging.log4j.core.filter.ThresholdFilter.filter(ThresholdFilter.java:70)
>      [java]   at 
> org.apache.logging.log4j.core.filter.ThresholdFilter.filter(ThresholdFilter.java:66)
>      [java]   at 
> org.apache.logging.log4j.core.filter.AbstractFilterable.isFiltered(AbstractFilterable.java:124)
>      [java]   at 
> org.apache.logging.log4j.core.appender.SMTPAppender.isFiltered(SMTPAppender.java:157)
>      [java]   at 
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:94)
>      [java]   at 
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:425)
>      [java]   at 
> org.apache.logging.log4j.core.async.AsyncLoggerConfig.asyncCallAppenders(AsyncLoggerConfig.java:116)
>      [java]   at 
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapperHandler.onEvent(AsyncLoggerConfigHelper.java:218)
>      [java]   at 
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapperHandler.onEvent(AsyncLoggerConfigHelper.java:203)
>      [java]   at 
> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:133)
>      [java]   at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>      [java]   at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>      [java]   at java.lang.Thread.run(Thread.java:695)
>      [java] Exception in thread "AsyncLoggerConfig-1" 
> java.lang.RuntimeException: java.lang.NullPointerException
>      [java]   at 
> com.lmax.disruptor.FatalExceptionHandler.handleEventException(FatalExceptionHandler.java:45)
>      [java]   at 
> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:152)
>      [java]   at 
> java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:895)
>      [java]   at 
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:918)
>      [java]   at java.lang.Thread.run(Thread.java:695)
>      [java] Caused by: java.lang.NullPointerException
>      [java]   at 
> org.apache.logging.log4j.core.filter.ThresholdFilter.filter(ThresholdFilter.java:70)
>      [java]   at 
> org.apache.logging.log4j.core.filter.ThresholdFilter.filter(ThresholdFilter.java:66)
>      [java]   at 
> org.apache.logging.log4j.core.filter.AbstractFilterable.isFiltered(AbstractFilterable.java:124)
>      [java]   at 
> org.apache.logging.log4j.core.appender.SMTPAppender.isFiltered(SMTPAppender.java:157)
>      [java]   at 
> org.apache.logging.log4j.core.config.AppenderControl.callAppender(AppenderControl.java:94)
>      [java]   at 
> org.apache.logging.log4j.core.config.LoggerConfig.callAppenders(LoggerConfig.java:425)
>      [java]   at 
> org.apache.logging.log4j.core.async.AsyncLoggerConfig.asyncCallAppenders(AsyncLoggerConfig.java:116)
>      [java]   at 
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapperHandler.onEvent(AsyncLoggerConfigHelper.java:218)
>      [java]   at 
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper$Log4jEventWrapperHandler.onEvent(AsyncLoggerConfigHelper.java:203)
>      [java]   at 
> com.lmax.disruptor.BatchEventProcessor.run(BatchEventProcessor.java:133)
>    



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