Flume要想将数据输出到HDFS，必须持有Hadoop相关jar包：commons-configuration-1.6.jar、 hadoop-auth-2.7.2.jar、 hadoop-common-2.7.2.jar、 hadoop-hdfs-2.7.2.jar、 commons-io-2.4.jar、 htrace-core-3.1.0-incubating.jar