I have the following doubts: 1. How to print log information in Hadoop. In the documentation, I have read that hadoop-<username>-<processname>-<machinename>.log contains logs. I have used Log log = LogFactory.getLog(FBEMMapper.class); and log.info(....);
for printing into log, but I do not see any log information in log file. I have also used System.out.println() but these are also not getting printed in .log or .out file. Do we need to change some log level in hadoop? Do we need to enable logging for some class? which log4j.properties file we need to change? Firstly, am I doing right things for logging? Actually the problem is I have written my custom FileInputFormat and WritableComparable for my purpose. My program runs fine, but I do not see any output. That is why I need to print some log statement to debug the problem. Thank you. - Nachiket
