Kafka源码工程examples项目配置log4j

examples项目启动想知道有哪些错误，通过日志了解代码执行逻辑，但是启动SimpleConsumerDemo了报错如下：

log4j.proproties也配置了

log4j.proproties配置如下：

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log4j.rootLogger=DEBUG, stdout, log

log4j.appender.stdout=org.apache.log4j.ConsoleAppender
log4j.appender.stdout.layout=org.apache.log4j.PatternLayout
log4j.appender.stdout.layout.ConversionPattern=[%d] %p %m (%c:%L)%n

log4j.logger.kafka=DEBUG
log4j.logger.org.apache.kafka=DEBUG

### log file ###
log4j.appender.log = org.apache.log4j.DailyRollingFileAppender
log4j.appender.log.File = /Users/lizhitao/code/kafka-0.11.0.2-src/examples/logs/kafka.log
log4j.appender.log.Append = true
log4j.appender.log.Threshold = DEBUG
log4j.appender.log.DatePattern='.'yyyy-MM-dd
log4j.appender.log.layout = org.apache.log4j.PatternLayout
log4j.appender.log.layout.ConversionPattern = [kafka][%p] [%-d{yyyy-MM-dd HH:mm:ss}] %C.%M(%L) | %m%n

# zkclient can be verbose, during debugging it is common to adjust is separately
log4j.logger.org.I0Itec.zkclient.ZkClient=WARN
log4j.logger.org.apache.zookeeper=WARN
 

No appenders could be found for logger，意思是log4.proproties找不到，如果默认位置找不到，我们可以自行动态配置

generateData()方法加入如下log4j配置代码：

PropertyConfigurator.configure("/Users/lizhitao/code/xxx-proj/kafka-0.11.0.2-src/examples/src/main/resources/log4j.properties");

再次启动SimpleConsumerDemo，搞定，日志有输出