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使用JDBC连接数据库时，报如下错： log4j:WARN No appenders could be found for logger (org.apache.hive.jdbc.Utils). log4j:WARN Please initialize the log4j system properly. log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info. 解决： 在src目录下新建log4j.properties ------------------------------------------------------- inceptor.root.logger=INFO,RFA inceptor.log.dir=/usr/lib/ngmr/logs inceptor.log.file=spark.log # Define the root logger to the system property "hadoop.root.logger". log4j.rootLogger=${inceptor.root.logger} # Set everything to be logged to the console log4j.appender.console=org.apache.log4j.ConsoleAppender log4j.appender.console.target=System.err log4j.appender.console.layout=org.apache.log4j.PatternLayout log4j.appender.console.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c: %m%n # output to file log4j.appender.RFA=org.apache.log4j.RollingFileAppender log4j.appender.RFA.File=${inceptor.log.dir}/${inceptor.log.file} # The MaxFileSize can be 512KB log4j.appender.RFA.MaxFileSize=10MB # Keep three backup files. log4j.appender.RFA.MaxBackupIndex=1024 # Pattern to output: date priority [category] - message log4j.appender.RFA.layout=org.apache.log4j.PatternLayout log4j.appender.RFA.layout.ConversionPattern=%d{yy/MM/dd HH:mm:ss} %p %c: %m%n # Ignore messages below warning level from Jetty, because it's a bit verbose log4j.logger.org.eclipse.jetty=WARN

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