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https://issues.apache.org/jira/browse/NIFI-3129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15708954#comment-15708954
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Mark Payne commented on NIFI-3129:
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The issue appears to happen under the following scenario:
Create a Controller Service in a Process Group.
Add a Processor that references the Controller Service.
Create a child Process Group.
Within the child Process Group, create a Processor that references the
Controller Service in the parent Process Group.
Create a template that includes both the Processor in the parent group and the
child Process Group.
Attempt to add the template to the flow, and it will fail with the error above.
> When adding template to flow, I receive failure message "The specified
> observer identifier already exists."
> -----------------------------------------------------------------------------------------------------------
>
> Key: NIFI-3129
> URL: https://issues.apache.org/jira/browse/NIFI-3129
> Project: Apache NiFi
> Issue Type: Bug
> Components: Core Framework
> Affects Versions: 1.0.0, 1.1.0
> Reporter: Mark Payne
> Assignee: Mark Payne
> Priority: Critical
> Fix For: 1.2.0
>
>
> I have a template that I generated. Whenever I try to drop the template onto
> the graph, and the UI gives me an error: "The specified observer identifier
> already exists."
> Part of the template is added to the graph, but it then stops without adding
> the rest of the components.
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