[jira] [Created] (LOG4J2-1417) Unbox should respect Constants.ENABLE_THREADLOCALS

["Remko Popma (JIRA)" <ji...@apache.org>]

Remko Popma created LOG4J2-1417:
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             Summary: 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


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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