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Posted to notifications@logging.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/12/23 20:17:00 UTC
[jira] [Work logged] (LOG4J2-2415) Lock contention in classloader
because of missing org.slf4j.ext.EventData
[ https://issues.apache.org/jira/browse/LOG4J2-2415?focusedWorklogId=362701&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-362701 ]
ASF GitHub Bot logged work on LOG4J2-2415:
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Author: ASF GitHub Bot
Created on: 23/Dec/19 20:16
Start Date: 23/Dec/19 20:16
Worklog Time Spent: 10m
Work Description: turbanoff commented on pull request #324: LOG4J2-2415 - Lock contention in classloader because of missing org.slf4j.ext.EventData
URL: https://github.com/apache/logging-log4j2/pull/324
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Issue Time Tracking
-------------------
Worklog Id: (was: 362701)
Remaining Estimate: 0h
Time Spent: 10m
> Lock contention in classloader because of missing org.slf4j.ext.EventData
> -------------------------------------------------------------------------
>
> Key: LOG4J2-2415
> URL: https://issues.apache.org/jira/browse/LOG4J2-2415
> Project: Log4j 2
> Issue Type: Bug
> Components: SLF4J Bridge
> Affects Versions: 2.11.0
> Reporter: Andrey Turbanov
> Priority: Major
> Attachments: LOG4J2-2415.patch, screenshot-1.png
>
> Time Spent: 10m
> Remaining Estimate: 0h
>
> 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.
> {noformat}
> 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>()
> {noformat}
> !screenshot-1.png!
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