No appenders could be found for logger (org.apache.flume.node.Application).

[root@test bin]# ./flume-ng agent -n a1 -c conf -f conf/flume-conf.properties
+ exec /usr/java/jdk1.6.0_30/bin/java -Xmx20m -cp 'conf:/usr/local/flume/lib/*' -Djava.library.path= org.apache.flume.node.Application -n a1 -f conf/flume-conf.properties
log4j:WARN No appenders could be found for logger (org.apache.flume.node.Application).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.

解决方法，但我没有解决该问题

说是JDK的环境变量设置问题。

http://stackoverflow.com/questions/12280403/flume-running-failed-in-linux