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From "Prabhu Joseph (JIRA)" <j...@apache.org>
Subject [jira] [Created] (YARN-9342) Moving log4j1 to log4j2 in hadoop-yarn
Date Mon, 04 Mar 2019 05:09:00 GMT
Prabhu Joseph created YARN-9342:
-----------------------------------

             Summary: Moving log4j1 to log4j2 in hadoop-yarn
                 Key: YARN-9342
                 URL: https://issues.apache.org/jira/browse/YARN-9342
             Project: Hadoop YARN
          Issue Type: Improvement
    Affects Versions: 3.1.2
            Reporter: Prabhu Joseph
            Assignee: Prabhu Joseph


1. Log4j2 Asynchronous Logging will give significant improvement in the performance.

2. Log4j2 does not have below locking issue which Log4j1 has.

{code}
"Thread-16" #40 daemon prio=5 os_prio=0 tid=0x00007f181f9bb800 nid=0x125 waiting for monitor
entry [0x00007ef163bab000]
   java.lang.Thread.State: BLOCKED (on object monitor)
	at org.apache.log4j.Category.callAppenders(Category.java:204)
	- locked <0x00007ef2d803e2b8> (a org.apache.log4j.spi.RootLogger)
	at org.apache.log4j.Category.forcedLog(Category.java:391)
	at org.apache.log4j.Category.log(Category.java:856)
	at org.apache.commons.logging.impl.Log4JLogger.info(Log4JLogger.java:176)
{code}

https://bz.apache.org/bugzilla/show_bug.cgi?id=57714



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