My flume app is attempting to write to HDFS on a path thats not been created/granted for it.
The path is /tmp, create it manually and grant flume write access for it.
For example, if I want a /tmp path on HDFS, for user flume to write to:
sudo -u hdfs hadoop fs -mkdir /tmp sudo -u hdfs hadoop fs -chown flume:flume /tmp
And retry my flume app, and it should work.