In Hadoop, By default Logging level will be determined by logging configuration variable HADOOP_ROOT_LOGGER in hadoop-env.sh file or by hadoop.root.logger property in log4j.properties file. Default logging configuration is:
export HADOOP_ROOT_LOGGER = "INFO,console"
i.e. logging level is INFO and logging destination is console. But some times, this setting results in lot of Warning messages on console and leads to confusion in finding the actual required messages on the console. Below are the sample warning messages which […]