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  1. Log4j 2
  2. LOG4J2-467

Thread name caching in async logger incompatible with use of Thread.setName()


    • Type: Bug
    • Status: Closed
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.0-beta9
    • Fix Version/s: 2.0-rc1, 2.0
    • Component/s: Core
    • Labels:
    • Environment:

      Debian Squeeze amd64
      OpenJDK 7u25


      AsyncLogger caches a thread's name in a thread-local info variable. I make use of a thread pool where the submitted Runnables call Thread.setName() at the beginning of their task and the thread name is included in the log message. For an example of this behavior, see org.jboss.netty.util.ThreadRenamingRunnable in Netty 3.x. With the cached thread name, the log messages will contain whatever name the thread had when it logged for the first time and so long as the thread doesn't terminate (such as in a core pool thread), all log messages involving this thread will be erroneous. If Thread.getName has a significant performance impact for async logging, I would be satisfied if this behavior were configurable, perhaps on a per-logger basis, so that the penalty only needs to be taken by users who make use of Thread.setName()


        1. PerfTestDriver.java
          16 kB
          Remko Popma
        2. PerfTestDriver.java
          15 kB
          Remko Popma

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              • Assignee:
                rpopma Remko Popma
                abaldocchi Anthony Baldocchi
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