22/04/19 00:33:54 ERROR node.Application: A fatal error occurred while running. Exception follows.
org.apache.commons.cli.ParseException: The specified configuration file does not exist: /usr/local/flume/conf/conf/master.conf
at org.apache.flume.node.Application.main(Application.java:316)
启动命令有问题吧，
flume-ng agent -n a1 -c conf -f ./conf/conf/master.conf -Dflume.root.logger=INFO,console
大概这样试试