Marcio Sugar created NIFI-6879:
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Summary: Variable Updater Error when trying to change variable
used inside a Process Group
Key: NIFI-6879
URL: https://issues.apache.org/jira/browse/NIFI-6879
Project: Apache NiFi
Issue Type: Bug
Components: Core Framework
Affects Versions: 1.10.0
Environment: Ubuntu 16.04
Reporter: Marcio Sugar
This works fine in NiFi 1.7.1 but fails in NiFi 1.10.1.
Whenever I try to change the value of a variable that's defined outside a
Process Group where it's used, NiFi fails during the Applying Updates with the
following message (image also attached):
{noformat}
Variable Update Error
Unable to complete variable update request: Failed to update Variable Registry
because failed while performing step: Applying updates to Variable
Registry.{noformat}
To reproduce the problem:
# On the top-level canvas, create a variable named "myvar", and set it to
"{{blah}}".
# Create a Process Group named "mypg". Enter the group.
# Inside "mypg", add a GenerateFlowFile and set its "Run Schedule" to "1 day"
to get just one flow file when it's started.
# Still inside "mypg", add a LogMessage. Set its "Log prefix" to "{{MYLOG:}} "
and its "Log message" to "{{My message is: '${myvar}'.}}"
# Start both processors and see a message like this appeared in the
application's log: {{MYLOG: My message is: 'blah'.}}
# Now leave the "mypg" Process Group and go back to the top-level canvas. Try
to set the "myvar" variable to a different value, like "{{blah-blah}}". NiFi
starts the steps to make the change, but fails during the "Applying Updates"
step with the above error message.
Images and log file attached.
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