Time for action – logging to the console

It's not always convenient to have to look at log files, particularly when we already have the agent screen open. Let's modify the agent to also log events to the screen.

1. Restart the Flume agent with an additional argument:

   $ flume-ng agent --conf conf --conf-file 10a.conf --name agent1 -Dflume.root.logger=INFO,console
   

   You will receive the following response:

   Info: Sourcing environment configuration script /home/hadoop/flume/conf/flume-env.sh
   …
   org.apache.flume.node.Application --conf-file 10a.conf --name agent1
   2012-08-19 00:41:45,462 (main) [INFO - org.apache.flume.lifecycle.LifecycleSupervisor.start(LifecycleSupervisor.java:67)] Starting lifec
   

2. In another window, connect to the server via curl:

   $ curl telnet://localhost:3000
   

3. Type in Hello and Flume on separate lines, hit Ctrl + C, and then check the agent window:

   

What just happened?

We added this example as it becomes very useful when debugging or creating new flows.

As seen in the previous example...