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  1. Log4j 2
  2. LOG4J2-2415

Lock contention in classloader because of missing org.slf4j.ext.EventData

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Details

    • Bug
    • Status: Resolved
    • Major
    • Resolution: Fixed
    • 2.11.0
    • 2.13.1
    • SLF4J Bridge
    • None

    Description

      Recently I found one of lock contention and performance problem in our application.
      As you can see it happens because we don't have org.slf4j.ext.EventData class in classpath, but slf4j bridge tries to load it on every Logger creation.

      Class java.lang.ClassLoader.loadClass(java.lang.String, boolean)
         Class sun.misc.Launcher$AppClassLoader.loadClass(java.lang.String, boolean)
            Class java.lang.ClassLoader.loadClass(java.lang.String)
               Class org.apache.logging.log4j.util.LoaderUtil.loadClass(java.lang.String)
                  EventDataConverter org.apache.logging.slf4j.Log4jLogger.createConverter()
                     void org.apache.logging.slf4j.Log4jLogger.<init>(org.apache.logging.log4j.spi.ExtendedLogger, java.lang.String)
                        Logger org.apache.logging.slf4j.Log4jLoggerFactory.newLogger(java.lang.String, org.apache.logging.log4j.spi.LoggerContext)
                           Object org.apache.logging.slf4j.Log4jLoggerFactory.newLogger(java.lang.String, org.apache.logging.log4j.spi.LoggerContext)
                              Object org.apache.logging.log4j.spi.AbstractLoggerAdapter.getLogger(java.lang.String)
                                 Logger org.apache.logging.slf4j.Log4jLoggerFactory.getLogger(java.lang.String)
                                    Logger org.slf4j.LoggerFactory.getLogger(java.lang.String)
                                       void com.devexperts.dxcore.api.AccountGroupsCacheImpl.<init>()
      

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            Unassigned Unassigned
            turbanoff Andrey Turbanov
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