Monitoring the publishing process
The use of post-process plugins makes the publishing process much more modular. This lets you monitor every step progress with much detail.
In Content Manager Event Log pane you can follow every step of the publishing process. In the case of post-process plugin based publish, you can see on exactly which step the publish is currently working.
Each plugin has its own log line in the Event Log. Therefore, you can spot where the failure took place. Also you don't have to wait for a global end of execution before the failure is visible to you.