I'm just getting started with NiFi, and it's great when things work first shot.
When things fail, I'd like to view the flow file, or the output (stdout+stderr) from the problematic processor. Is there an easy way to dump out all of the flow file's properties, or to just browse a flow file?
I feel like I've missed something incredibly obvious, but most of the tutorials just walk though examples where everything works first shot.
Processors usually have one or more relationships for failures and it is up to the data flow designer to determine what to do with these.
Some failures are due to temporary conditions like if a destination system was down, for those they would typically be looped back to the same processor to keep retrying until the destination comes back up.
Other failures are due to issues related to the data and likely don't make sense to retry because they will continue to fail. This set of failures you can route to PutFile processor to write them out to directory somewhere, or a PutEmail processor to notify you. Either of those would give you access to the raw data. If you want to see the flow file attributes you could use data provenance to look at all the flow files that passed through the PutFile/PutEmail processor.
