HADOOP-17642. Remove appender EventCounter to avoid instantiation (#2922)

Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

hadoop-common-project/hadoop-common/src/main/conf/log4j.properties

@@ -20,7 +20,7 @@ hadoop.log.dir=.
 hadoop.log.file=hadoop.log
 
 # Define the root logger to the system property "hadoop.root.logger".
-log4j.rootLogger=${hadoop.root.logger}, EventCounter
+log4j.rootLogger=${hadoop.root.logger}
 
 # Logging Threshold
 log4j.threshold=ALL
@@ -176,12 +176,6 @@ log4j.appender.DNMETRICSRFA.MaxFileSize=64MB
 log4j.logger.com.amazonaws.http.AmazonHttpClient=ERROR
 #log4j.logger.org.apache.hadoop.fs.s3a.S3AFileSystem=WARN
 
-#
-# Event Counter Appender
-# Sends counts of logging messages at different severity levels to Hadoop Metrics.
-#
-log4j.appender.EventCounter=org.apache.hadoop.log.metrics.EventCounter
-
 
 #
 # shuffle connection log from shuffleHandler

hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/resources/container-log4j.properties

@@ -16,7 +16,7 @@ hadoop.root.logger=DEBUG,CLA
 yarn.app.mapreduce.shuffle.logger=${hadoop.root.logger}
 
 # Define the root logger to the system property "hadoop.root.logger".
-log4j.rootLogger=${hadoop.root.logger}, EventCounter
+log4j.rootLogger=${hadoop.root.logger}
 
 # Logging Threshold
 log4j.threshold=ALL
@@ -69,8 +69,3 @@ log4j.additivity.org.apache.hadoop.mapreduce.task.reduce=false
 #
 log4j.logger.org.apache.hadoop.mapred.Merger=${yarn.app.mapreduce.shuffle.logger}
 log4j.additivity.org.apache.hadoop.mapred.Merger=false
-#
-# Event Counter Appender
-# Sends counts of logging messages at different severity levels to Hadoop Metrics.
-#
-log4j.appender.EventCounter=org.apache.hadoop.log.metrics.EventCounter