启动Flume Agent出现“A fatal error occurred while running“解决方法

  在安装完flume后启动日志控制台时出现如下报错

2020-11-13 18:10:23,564 ERROR [main] node.Application: A fatal error occurred while running. Exception follows.
java.lang.NullPointerException
	at java.io.File.(File.java:277)
	at org.apache.flume.node.Application.main(Application.java:299)

当时也很疑惑，步骤是按照书上教程执行，包括配置和命令也检查过没有问题，Agent配置文件avro.conf如下

a1.sources = r1
a1.sinks = k1
a1.channels = c1
# Describe/configure the source
a1.sources.r1.type = avro
a1.sources.r1.channels = c1
a1.sources.r1.bind = 0.0.0.0
a1.sources.r1.port = 4141
# Describe the sink
a1.sinks.k1.type = logger
# Use a channel which buffers events in memory
a1.channels.c1.type = memory
a1.channels.c1.capacity = 1000
a1.channels.c1.transactionCapacity = 100
# Bind the source and sink to the channel
a1.sources.r1.channels = c1
a1.sinks.k1.channel = c1

（其路径为/usr/local/flume/conf/avro.conf，配置文件的路径要清楚，解决办法中需要用到）

我之前使用的命令是

/usr/local/flume/bin/flume-ng agent -c . -f /usr/local/flume/conf/avro.conf -n a1 -Dflume.root.logger=INFO,console

结果出现如上报错，去网上搜索解决办法，最后在stackoverflow中发现此方法，即换个命令

flume-ng agent --conf /usr/local/flume/conf --conf-file /usr/local/flume/conf/avro.conf --name a1 -Dflume.root.logger=INFO,console

输入此命令再次启动即可解决。