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https://issues.apache.org/jira/browse/HADOOP-17642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17324193#comment-17324193
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Viraj Jasani commented on HADOOP-17642:
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[~aajisaka] one small change pending. Could you please take a look?
Thanks
> Could not instantiate class org.apache.hadoop.log.metrics.EventCounter
> ----------------------------------------------------------------------
>
> Key: HADOOP-17642
> URL: https://issues.apache.org/jira/browse/HADOOP-17642
> Project: Hadoop Common
> Issue Type: Bug
> Reporter: Viraj Jasani
> Assignee: Viraj Jasani
> Priority: Major
> Labels: pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> After removal of EventCounter class, we are not able to bring up HDFS cluster.
> {code:java}
> log4j:ERROR Could not instantiate class
> [org.apache.hadoop.log.metrics.EventCounter].
> java.lang.ClassNotFoundException: org.apache.hadoop.log.metrics.EventCounter
> at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
> at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
> at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
> at java.lang.Class.forName0(Native Method)
> at java.lang.Class.forName(Class.java:264)
> at org.apache.log4j.helpers.Loader.loadClass(Loader.java:198)
> at
> org.apache.log4j.helpers.OptionConverter.instantiateByClassName(OptionConverter.java:327)
> at
> org.apache.log4j.helpers.OptionConverter.instantiateByKey(OptionConverter.java:124)
> at
> org.apache.log4j.PropertyConfigurator.parseAppender(PropertyConfigurator.java:785)
> at
> org.apache.log4j.PropertyConfigurator.parseCategory(PropertyConfigurator.java:768)
> at
> org.apache.log4j.PropertyConfigurator.configureRootCategory(PropertyConfigurator.java:648)
> at
> org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:514)
> at
> org.apache.log4j.PropertyConfigurator.doConfigure(PropertyConfigurator.java:580)
> at
> org.apache.log4j.helpers.OptionConverter.selectAndConfigure(OptionConverter.java:526)
> at org.apache.log4j.LogManager.<clinit>(LogManager.java:127)
> at org.slf4j.impl.Log4jLoggerFactory.<init>(Log4jLoggerFactory.java:66)
> at org.slf4j.impl.StaticLoggerBinder.<init>(StaticLoggerBinder.java:72)
> at
> org.slf4j.impl.StaticLoggerBinder.<clinit>(StaticLoggerBinder.java:45)
> at org.slf4j.LoggerFactory.bind(LoggerFactory.java:150)
> at org.slf4j.LoggerFactory.performInitialization(LoggerFactory.java:124)
> at org.slf4j.LoggerFactory.getILoggerFactory(LoggerFactory.java:417)
> at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:362)
> at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:388)
> at org.apache.hadoop.conf.Configuration.<clinit>(Configuration.java:229)
> at org.apache.hadoop.hdfs.tools.GetConf.<clinit>(GetConf.java:131)
> log4j:ERROR Could not instantiate appender named "EventCounter".
> {code}
> We need to clean up log4j.properties to avoid instantiating appender
> EventCounter.
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