GetSFTP reporting Processing Failed

[#1]

Hello,
I have a 3 nodes cluster environment running Nifi version 1.29.  Nifi logs are sync to Elastic Search; I noticed that GetSFTP is reporting Processing Failed multiple times.  It appears the processor recover on its own for example from January 1st to present reported 392 times events.   I'm trying to identify, why this is occurring as the log doesn't show much beside that message.    Any idea why this is occurring?

Example of message:
GetSFTP[id=633332e2-0ad4-17db-85d0-2ec76b7a49bc] Processing failed

Thanks!

[#2]

Hello @jame1997, 

Thanks for being part of our community. 

Is that all the message you have on the logs? Have you checked directly on the nifi-app.log? 
Usually those messages include more details or traces that show some reason of the failure. 

If needed, maybe you can add DEBUG level to that processor so we can get more details when it fails. 
On the logback.xml and under </configuration> add this line: 

<logger name="org.apache.nifi.processors.standard.GetSFTP" level="DEBUG"/>

Then monitor for the next failure, collect the logs and rollback the change.