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https://issues.apache.org/jira/browse/LOG4J2-940?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14282138#comment-14282138
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Siva B commented on LOG4J2-940:
-------------------------------
Thanks for your detailed response!
We are using "AsyncLogger" for 141 logs in single JVM,
Here is the log4j.xml configuration,
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="debug">
<Appenders>
<File name="ABCLogAppender" fileName="/logs/app/ABCLogFile.log">
<PatternLayout pattern="%d{yyyy.MM.dd
HH:mm:ss,SSS}|%X{1}:%X{2}|%X{3}| %p [ %C %M ] %m%n " />
</File>
<!-- Repeat 141 times -->
</Appenders>
<Loggers>
<AsyncLogger name="ABCLogFile" level="DEBUG" additivity="false">
<AppenderRef ref="ABCLogAppender" />
</AsyncLogger>
<!-- Repeat 141 times -->
<Root level="ERROR">
<AppenderRef ref="ABCLogAppender" />
</Root>
</Loggers>
</Configuration>
> Large number of RUNNABLE threads at "AsyncLoggerConfig.callAppenders" causing
> High CPU
> --------------------------------------------------------------------------------------
>
> Key: LOG4J2-940
> URL: https://issues.apache.org/jira/browse/LOG4J2-940
> Project: Log4j 2
> Issue Type: Bug
> Components: Appenders
> Affects Versions: 2.0-rc2
> Environment: RHEL 6.2
> Apache Tomcat 7
> Java 7
> Reporter: Siva B
>
> 336 threads are in RUNNING state with below stack trace causing the JVM to
> consume more CPU.
> "ajp-bio-15024-exec-138" daemon prio=10 tid=0x00007f5870046000 nid=0x52d7
> runnable [0x00007f5921f56000]
> java.lang.Thread.State: TIMED_WAITING (parking)
> at sun.misc.Unsafe.park(Native Method)
> at
> java.util.concurrent.locks.LockSupport.parkNanos(LockSupport.java:349)
> at
> com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:133)
> at
> com.lmax.disruptor.MultiProducerSequencer.next(MultiProducerSequencer.java:102)
> at com.lmax.disruptor.RingBuffer.publishEvent(RingBuffer.java:466)
> at
> org.apache.logging.log4j.core.async.AsyncLoggerConfigHelper.callAppendersFromAnotherThread(AsyncLoggerConfigHelper.java:342)
> at
> org.apache.logging.log4j.core.async.AsyncLoggerConfig.callAppenders(AsyncLoggerConfig.java:111)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:407)
> at
> org.apache.logging.log4j.core.config.LoggerConfig.log(LoggerConfig.java:365)
> at org.apache.logging.log4j.core.Logger.logMessage(Logger.java:103)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logMessage(AbstractLogger.java:1336)
> at
> org.apache.logging.log4j.spi.AbstractLogger.logIfEnabled(AbstractLogger.java:1325)
> at
> org.apache.logging.log4j.spi.AbstractLogger.log(AbstractLogger.java:1237)
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