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https://issues.apache.org/jira/browse/NIFI-12991?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Gabriel Orstadius-Bui updated NIFI-12991:
-----------------------------------------
Fix Version/s: 2.0.0-M3
> Can't switch to Standard execution engine if there is a child process group
> inheriting
> ---------------------------------------------------------------------------------------
>
> Key: NIFI-12991
> URL: https://issues.apache.org/jira/browse/NIFI-12991
> Project: Apache NiFi
> Issue Type: Bug
> Components: NiFi Stateless
> Affects Versions: 2.0.0-M2
> Reporter: Gabriel Orstadius-Bui
> Priority: Major
> Fix For: 2.0.0-M3
>
>
> If process group "A" has child process group "B" which inherits its parent's
> (A's) execution engine, switching A's execution engine to Stateless is no
> problem.
> However, thereafter switching A's execution engine back to Standard leads to
> this error message being shown:
> "A Process Group using the Standard Engine may not be the child of a Process
> Group using the Stateless Engine. Cannot set Execution Engine of
> StandardProcessGroup[identifier=f406cf3a-018d-1000-42a3-6a708991aab7,name=B]
> to Standard because it is a child of
> StandardProcessGroup[identifier=e574e59b-018d-1000-530e-0a9db5c39a6e,name=A]"
> It seems as if NiFi in this case first tries to switch B's execution engine
> to standard, which is not allowed because A is still using the Standard
> execution engine. In this case, NiFi should instead first change A's
> execution engine and thereafter B's.
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