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If no exception or failure information is displayed, running the application is successful.
The log level is INFO by default and you can view more detailed information by changing the log level, such as DEBUG, INFO, WARN, ERROR, and FATAL. You can modify the log4j.properties file to change log levels, for example:
hbase.root.logger=INFO,console log4j.logger.org.apache.zookeeper=INFO #log4j.logger.org.apache.hadoop.fs.FSNamesystem=DEBUG log4j.logger.org.apache.hadoop.hbase=INFO # Make these two classes DEBUG-level. Make them DEBUG to see more zk debug. log4j.logger.org.apache.hadoop.hbase.zookeeper.ZKUtil=INFO log4j.logger.org.apache.hadoop.hbase.zookeeper.ZooKeeperWatcher=INFO
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