flume报错记录:java.net.ConnectException: 拒绝连接; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
具体信息
java.net.ConnectException: Call From hadoop114/192.168.149.114 to hadoop114:8020 failed on connection exception: java.net.ConnectException: 拒绝连接; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
Caused by: java.net.ConnectException: 拒绝连接
解决方案：
参考：https://zhuanlan.zhihu.com/p/460722371
8020：不一定就是8020 要查看自己的core-site.xml
cd /opt/module/hadoop-3.1.3/etc/hadoop/
cat core-site.xml
改成9820即可（flume-exec-hdfs.conf中的hdfs的端口改为和 core-site.xml中的信息一样即可）
其他该类bug的诊断：查看端口是否在进程当中
