I have recently noticed that when a download fails, the entry is not getting blacklisted. When I check the logs, I see that the request is being sent to Sabnzb, which then performs the download. However, if it fails, there is no notification back that is failed and thereby no blacklisting of the item. I am using version 2.0.0.2850 with SAB version 0.7.16. Any thoughts would be much appreciated!
Debug logs would be the first thing to check, Sonarr will log if it sees a failed download that it can’t process (not grabbed by Sonarr) at the debug level.
Some functionality of SAB can cause issues for Sonarr, one in particular is pre-checking NZBs to see if they are going to fail, this causes SAB to generate a new ID and breaks Sonarr.
I checked the debug logs and found no response at all from SAB. I did see the SAB confirmation that it was adding the request to the queue, but nothing after that. I also checked the SAB config and the Check before download option is not checked.
Are you using a category with SAB (and set properly in Sonarr)?
Sonarr will log things as it processes them from SAB, the response from SAB is only logged with trace logging, but not really something you need to look at at this time, search the logs for the nzb name and you can see every time Sonarr attempted to process it.