Hi James, Sharing your Nifi version would help identify the issue.
However, one thing which I encountered while working with Nifi version 1.23.2 that the processor does not like embedded comments in the transformations. I needed to remove all the comments. I tested yours by removing the comment and it seems to be working fine: [ { "operation": "shift", "spec": { "ids": "ids", "parents": "parents", "dates": "dates", "triage": "triage", "payload": "payload" } }, { "operation": "default", "spec": { "payload": "" } } ] Regards -- Arvind Singh Tomar On Mon, Feb 19, 2024 at 8:49 AM James McMahon <jsmcmah...@gmail.com> wrote: > I have this JSON as flowfile content: > > { > "dates" : { > "date_file" : "20240115184407", > "ingested" : "20240217175748", > "latest_date" : "19800000", > "earliest_date" : "19800000", > "date_info" : "YYYYMMDD" > }, > "parents" : { > "md5" : "86107362084b86ea64dc33dfde5e14ff", > "sha256" : > "4ffe010f3392dddb3a880f0e60a6bf35e1e41444b7e83be0746097557d555e0f" > }, > "triage" : { > "filetype" : "unstructured", > "languages" : "[\"gaelic\"]", > "filename" : "gaelicTest.txt" > }, > "ids" : { > "md5" : "86107362084b86ea64dc33dfde5e14ff", > "sha256" : > "4ffe010f3392dddb3a880f0e60a6bf35e1e41444b7e83be0746097557d555e0f", > "sku" : "00000" > } > } > > I am trying to apply a simple JOLT transform that adds a key payload at > the same level in my json as keys dates, parents, triage, and ids. > > I developed this transform - just about as simple a case you could > possibly hope for: > [ > { > "operation": "shift", > "spec": { > "ids": "ids", > "parents": "parents", > "dates": "dates", > "triage": "triage", > "payload": "payload" > } > }, > { > "operation": "default", > "spec": { > // if payload does not exist, then apply a default of null > "payload": "" > } > } > ] > > I tested this successfully here: https://jolt-demo.appspot.com/#inception > . > It works. > No big surprise - this is about as simple as it gets. > > Should work in nifi, right? Can't get much easier than this. > > But in nifi, it throws this error: > > JoltTransformJSON[id=4d6c3f69-a72e-16b2-8cfe-2a9adb9303c7] processor is not > valid: : com.bazaarvoice.jolt.exception.SpecException: Shiftr expected a spec > of Map type, got ArrayList > > > Why? How can I get this to work in NiFi? > > > >