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Posted to notifications@logging.apache.org by "Gary D. Gregory (Jira)" <ji...@apache.org> on 2022/04/07 20:48:00 UTC

[jira] [Updated] (LOG4J2-3471) log4j-1.2-api 2.17.2 throws NullPointerException while removing appender with name as null

     [ https://issues.apache.org/jira/browse/LOG4J2-3471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Gary D. Gregory updated LOG4J2-3471:
------------------------------------
    Summary: log4j-1.2-api 2.17.2 throws NullPointerException while removing appender with name as null  (was: log4j-1.2-api-2.17.2 throws NullPointerException while removing appender with name as null)

> log4j-1.2-api 2.17.2 throws NullPointerException while removing appender with name as null
> ------------------------------------------------------------------------------------------
>
>                 Key: LOG4J2-3471
>                 URL: https://issues.apache.org/jira/browse/LOG4J2-3471
>             Project: Log4j 2
>          Issue Type: Bug
>    Affects Versions: 2.17.2
>            Reporter: Rajesh
>            Assignee: Gary D. Gregory
>            Priority: Major
>
> The log4j 1.2 bridge for 2.17.2 throws null pointer exception while removing Null appender
> viz. org.apache.log4j.varia.NullAppender 
> The class AppenderAttachableImpl adds the null appender to the concurrenthashmap as "null" and on removal there is no check for null and removes the nullappender with name null hence the NullPointerexception.
> Caused by: java.lang.NullPointerException
> at java.util.concurrent.ConcurrentHashMap.remove(Unknown Source)
> at org.apache.log4j.helpers.AppenderAttachableImpl.removeAppender(AppenderAttachableImpl.java:93)
> at org.apache.log4j.Category.removeAppender(Category.java:618)



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