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https://issues.apache.org/jira/browse/LOG4J2-1417?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Remko Popma closed LOG4J2-1417.
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Resolution: Fixed
> Unbox should respect Constants.ENABLE_THREADLOCALS
> --------------------------------------------------
>
> Key: LOG4J2-1417
> URL: https://issues.apache.org/jira/browse/LOG4J2-1417
> Project: Log4j 2
> Issue Type: Bug
> Components: API
> Affects Versions: 2.6, 2.6.1
> Reporter: Remko Popma
> Assignee: Remko Popma
> Fix For: 2.6.2
>
>
> The org.apache.logging.log4j.util.Unbox class stores a non-JDK class
> (Unbox$State) in a static ThreadLocal field.
> This may cause memory leaks in containers which share thread pools between
> applications.
> One way to accomplish this is to have two ThreadLocal fields: one that stores
> an array of StringBuilders, and one that stores an AtomicLong to track the
> current slot.
> (If there is a performance impact we can switch between alternative
> implementations depending on the value of Constants.ENABLE_THREADLOCALS.)
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