Russell,
I'm not sure how to fix the relationships, but in flow.json.gz and flow.xml.gz,
scheduledState could be changed from RUNNING to ENABLED for each of these
processors and these messages shouldn't appear on startup.
Just to be clear, this is an unsupported operation, with potential for unknown
side effects.
Thanks,
Nissim
On Monday, July 21, 2025 at 08:20:08 PM EDT, Russell Bateman
<r...@windofkeltia.com> wrote:
Surprise, in the UI, of a working instance of NiFi 1.28.1, I get:
Unable to communicate with NiFi
Please ensure the application is running and check the logs for any
errors.
I have changed since it worked some logic inside a custom processor that
is neither of the following ones.
Checking the logs, I find nothing except in */nifi-app.log/* the
following. The two processors are my own.
2025-07-21 17:14:22,787 ERROR [Timer-Driven Process Thread-2]
c.i.processor.CreateAttributes
CreateAttributes[id=90508e0f-0195-1000-1579-ff0c3317c9a3]
Encountering difficulty starting. (Validation State is INVALID:
['Relationship Success' is invalid because Relationship
'Success' is not connected to any component and is not
auto-terminated]).
Will continue trying to start.
2025-07-21 17:14:22,787 ERROR [Timer-Driven Process Thread-8]
c.i.processor.SplitHl7v4Resources
SplitHl7v4Resources[id=ed6de974-0191-1000-fa4b-0830f49ec895]
Encountering difficulty starting. (Validation State is INVALID:
['Relationship ready--resource split out' is invalid because
Relationship 'ready--resource split out' is not connected to any
component and is not auto-terminated,
'Relationship failed--no Bundle' is invalid because
Relationship 'failed--no Bundle' is not connected to any component
and is not auto-terminated]).
Will continue trying to start.
I don't understand why either of these processor instances would have
lost relationship-arc connections with other components though doubtless
I did something to break (but what?).
What I would like to do is to doctor /*flow.xml.gz*/ to "fix" whatever
is needed to get back up and running (rather than removing my flow(s)
and starting from scratch. I have done similar things in the past
successfully (unzipping, editing, then re-zipping), but I do not know
how to "trick out" relationships. Also, I don't actually remember what
components these might be connected to because the flow(s) are non
trivial despite that I am able to find the instances in the unzipped
/*flow.xml*/:
russ@tirion ~/dev/nifi/nifi-1.28.1/conf $ fgrep
90508e0f-0195-1000-1579-ff0c3317c9a3 flow.xml [CreateAttributes]
<id>90508e0f-0195-1000-1579-ff0c3317c9a3</id>
<destinationId>90508e0f-0195-1000-1579-ff0c3317c9a3</destinationId>
russ@tirion ~/dev/nifi/nifi-1.28.1/conf $ fgrep
ed6de974-0191-1000-fa4b-0830f49ec895 flow.xml [SplitHl7v4Resources]
<id>ed6de974-0191-1000-fa4b-0830f49ec895</id>
<sourceId>ed6de974-0191-1000-fa4b-0830f49ec895</sourceId>
<sourceId>ed6de974-0191-1000-fa4b-0830f49ec895</sourceId>
<sourceId>ed6de974-0191-1000-fa4b-0830f49ec895</sourceId>
<sourceId>ed6de974-0191-1000-fa4b-0830f49ec895</sourceId>
<sourceId>ed6de974-0191-1000-fa4b-0830f49ec895</sourceId>
<destinationId>ed6de974-0191-1000-fa4b-0830f49ec895</destinationId>
Any suggestion would be appreciated.
Russ
