脚本启动flume 报错

Warning: No configuration directory set! Use --conf  to override.
Warning: JAVA_HOME is not set!
Info: Including Hive libraries found via () for Hive access
+ exec /usr/bin/java -Xmx20m -Dflume.root.logger=INFO,LOGFILE -cp '/opt/module/flume/lib/*:/lib/*' -Djava.library.path= org.apache.flume.node.Application --conf-file /opt/module/flume/conf/kafka-flume-hdfs.conf --name a1
log4j:WARN No appenders could be found for logger (org.apache.flume.lifecycle.LifecycleSupervisor).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

出现这个问题没办法解决