First of all, you are getting an error inside the python file. So we can eliminate several causes (e.g. not being able to access the file, or not being able to find the file). Secondly, I believe you are able to run the file from the command line, that would eliminate a problem in the file itself, or with the general logic and setup. This leaves two likely suspects: 1. You are running from a different place (for instance a different node) 2. You are running with different rights (for instance a different user) or less authentication (for instance no kerberos ticket) Step 1 can be tested easily by manually going to all Nifi nodes and running the command from the command line. Step 2 might be tested by running something like !whoami in python from the command line, and from nifi and inspecting the results. If this does not help, try to get some more info out of python on what goes wrong.
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